# SizeMarker

> SizeMarker (https://www.sizemarker.com) is a precise dimension & spec annotation tool. It adds accurate dimensions, spec labels, focus spotlights, callouts, and contour lines to product photos, so buyers see exact sizes and details before they order — cutting pre-sale size questions and size-driven returns for foreign-trade B2B suppliers (furniture, industrial, building materials) and e-commerce sellers.

Key facts:
- Measurements are drawn with deterministic geometry, so marked dimensions stay accurate; AI assists with placement but never guesses numbers — unlike AI image generators, which restyle photos but cannot mark true sizes.
- Scope: buyer-facing spec diagrams, not CAD or engineering drafting.
- Annotation types: dimension, label, focus, marketing callout, contour. Coordinates are normalized (0-1) so annotations survive image resize and zoom.
- Runs in the browser, free to start, no install required; a desktop app is also available.
- Available in 12 languages: en, zh-cn, zh-tw, ja, ko, es, pt, fr, de, th, id, fil.
- Pricing (USD): Free plan $0; Pro $19.90/month or $118.80/year; Enterprise $29.90/seat/month or $178.80/seat/year.

## Core pages
- [Home](https://www.sizemarker.com/): product overview, features, and pricing
- [Pricing](https://www.sizemarker.com/pricing): Free, Pro, and Enterprise plans with prices and what each plan includes
- [Site map](https://www.sizemarker.com/sitemap): full index of tools, comparisons, guides and the dimension reference library
- [Return cost calculator](https://www.sizemarker.com/tools/return-calculator): free tool to estimate what product returns cost per order and per month
- [Spec sheet scenario](https://www.sizemarker.com/scenarios/spec-sheet): how suppliers turn product photos into buyer-ready spec diagrams
- [Furniture spec diagram maker](https://www.sizemarker.com/scenarios/furniture-spec-diagram): mark furniture width, depth, height, packed size, materials and weight capacity from a photo to prevent size returns
- [Industrial spec diagram maker](https://www.sizemarker.com/scenarios/industrial-spec-diagram): mark equipment dimensions, port positions and technical specs B2B buyers can quote from, no CAD required
- [Building material spec diagram maker](https://www.sizemarker.com/scenarios/building-material-spec-diagram): mark tile, panel and profile size, thickness and coverage from a photo
- [Best tools to add dimensions to product photos](https://www.sizemarker.com/best-tools-to-add-dimensions-to-product-photos): honest comparison of SizeMarker vs Canva, Photoshop, Photopea, Figma, Snagit and Google Drawings for marking dimensions and specs on product photos
- [Best spec sheet software for exporters](https://www.sizemarker.com/best-spec-sheet-software-for-exporters): 7 tools compared for building export spec sheets — Excel/Word for the data table, SizeMarker for dimension-accurate spec diagrams, plus Canva, Photopea, Affinity, Visme and Specright
- [SizeMarker vs Canva](https://www.sizemarker.com/sizemarker-vs-canva): side-by-side comparison for adding accurate dimensions and specs to product photos
- [SizeMarker vs Photoshop](https://www.sizemarker.com/sizemarker-vs-photoshop): side-by-side comparison for adding accurate dimensions and specs to product photos
- [SizeMarker vs AI image generators](https://www.sizemarker.com/sizemarker-vs-ai-image-generators): why generative AI image tools cannot mark accurate dimensions, and when to use each
- [Ecommerce returns & size statistics](https://www.sizemarker.com/ecommerce-returns-size-statistics): 30 sourced statistics on return rates, size/fit as the top return reason, and how images and specs affect buying
- [Standard product dimensions reference](https://www.sizemarker.com/dimensions): sourced standard-size charts (furniture, logistics, building materials) in metric and imperial, from ISO/ANSI/EN and established industry standards
- [Standard sofa dimensions](https://www.sizemarker.com/dimensions/standard-sofa-dimensions): standard sofa sizes by type (loveseat, 3-seat, 4-seat, sectional) in cm and inches
- [Standard dining table dimensions](https://www.sizemarker.com/dimensions/standard-dining-table-dimensions): dining table size by number of seats, plus standard height and clearance
- [Standard mattress sizes](https://www.sizemarker.com/dimensions/standard-mattress-sizes): US, UK and EU bed sizes in inches and centimetres, and why the same name differs by region
- [Standard pallet sizes](https://www.sizemarker.com/dimensions/standard-pallet-sizes): ISO 6780 and regional pallet dimensions (GMA 48x40, Euro EPAL 1200x800, Asian, Australian)
- [Shipping container dimensions](https://www.sizemarker.com/dimensions/shipping-container-dimensions): ISO 668 external and internal size, volume and payload for 20ft, 40ft and High Cube
- [Standard door sizes](https://www.sizemarker.com/dimensions/standard-door-sizes): US and UK/EU interior and exterior door dimensions and thickness
- [Standard desk dimensions](https://www.sizemarker.com/dimensions/standard-desk-dimensions): desk height, width and depth by type, plus ANSI/BIFMA sit-stand ranges and OSHA legroom
- [Standard bookshelf dimensions](https://www.sizemarker.com/dimensions/standard-bookshelf-dimensions): bookcase width, depth, height and shelf spacing (IKEA Billy + library shelving)
- [Standard wardrobe dimensions](https://www.sizemarker.com/dimensions/standard-wardrobe-dimensions): single/double/triple widths, hanging depth and long-hang vs double-hang rail heights (IKEA PAX)
- [Standard office chair dimensions](https://www.sizemarker.com/dimensions/standard-office-chair-dimensions): BIFMA G1 seat, backrest and armrest adjustment ranges in cm and inches
- [Standard coffee table dimensions](https://www.sizemarker.com/dimensions/standard-coffee-table-dimensions): height, size by shape and the two-thirds-of-sofa pairing rule
- [Standard steel drum dimensions](https://www.sizemarker.com/dimensions/standard-steel-drum-dimensions): 55-gallon / 200L drum diameter and height, plus 30 and 16-gal, per ISO 15750
- [Standard IBC tote dimensions](https://www.sizemarker.com/dimensions/standard-ibc-tote-dimensions): 1000L / 275-gallon caged tote footprint and height from Schutz and Mauser datasheets
- [Standard corrugated box sizes](https://www.sizemarker.com/dimensions/standard-carton-box-sizes): FEFCO 0201 RSC box styles, A-F flute grades, and USPS/Amazon FBA box size limits
- [Standard tile sizes](https://www.sizemarker.com/dimensions/standard-tile-sizes): ceramic and porcelain formats, thickness by use and nominal vs actual sizing (ISO 13006)
- [Standard plywood sheet sizes](https://www.sizemarker.com/dimensions/standard-plywood-sheet-sizes): 4x8 ft and metric panels, thickness nominal vs actual (a 3/4-in sheet is 23/32 in), per APA
- [Dimensional lumber sizes](https://www.sizemarker.com/dimensions/dimensional-lumber-sizes): nominal vs actual softwood sizes (a 2x4 is 1.5 x 3.5 in / 38 x 89 mm) per US PS 20
- [Standard brick dimensions](https://www.sizemarker.com/dimensions/standard-brick-dimensions): US, UK/EU, China and India brick sizes, and the nominal vs specified/actual distinction
- [Standard stair dimensions](https://www.sizemarker.com/dimensions/standard-stair-dimensions): rise, run/going, width and headroom limits by US IRC and UK Approved Document K
- [Standard countertop dimensions](https://www.sizemarker.com/dimensions/standard-countertop-dimensions): counter height, depth, slab thickness, backsplash and quartz slab sizes (NKBA)
- [Showcase](https://www.sizemarker.com/showcase): real before/after annotation cases with results
- [Blog](https://www.sizemarker.com/blog): guides on spec diagrams, dimension labeling, returns reduction, and platform image rules

## Showcase cases
- [Amazon Bar Stool Size Labels Cut Return Questions](https://www.sizemarker.com/showcase/amazon-bar-stool-size-labels-reduce-returns): For this Amazon bar stool listing, we used SizeMarker to add clear seat height, overall height, width, and footrest measurements directly on the product image. The dimension lines show exact measurements in both inches and centimeters, making it easy for shoppers to check if the stool fits their counter or kitchen island.

Key annotations added:
- Seat height: critical for counter-height vs bar-height fit
- Overall height: helps buyers visualize the stool against their space
- Seat width and depth: comfort assessment at a glance
- Footrest height: important ergonomic detail often overlooked

Result: Sizing-related customer questions dropped by over 80%, return rate for size issues cut in half, and silent checkout conversions increased significantly.
- [Amazon Lounge Chair Labels Cut Returns 60%](https://www.sizemarker.com/showcase/amazon-lounge-chair-size-labels-cut-returns): For this Amazon lounge chair listing, we used SizeMarker to add comprehensive size markers covering overall width, seat depth, back height, and footrest extension length, plus feature labels and a clean outline curve.

Key annotations added:
- Overall dimensions (width x depth x height) for space planning
- Seat depth and back height for comfort assessment
- Footrest extension length for reclining chairs
- Feature callouts: material, weight capacity, mechanism
- Contour outline separating product from background

Result: Conversion rate increased by 35% and returns dropped by 60%, primarily eliminating size-mismatch complaints. The combination of precise measurements and feature labels turned the image into a complete decision-making tool.
- [Amazon Wall Cabinet Size Labels Cut Refunds](https://www.sizemarker.com/showcase/amazon-wall-cabinet-size-labels-cut-refunds): For this solid wood wall cabinet listing on Amazon, we used SizeMarker to add precise width, height, and depth dimension lines directly on the product images.

Key annotations added:
- External dimensions (width x height x depth)
- Internal shelf spacing for storage planning
- Clean minimal annotation style matching the product aesthetic

Result: Shoppers could instantly verify if the cabinet fits their wall space, leading to more confident purchases. Size-related refunds dropped to near zero, and customer service inquiries about dimensions decreased dramatically.

## Recent blog posts
- [Nominal vs Actual Dimensions: Why a 2x4 Isn't 2 Inches](https://www.sizemarker.com/blog/nominal-vs-actual-dimensions): Nominal vs actual dimensions: why a 2x4 is really 1.5x3.5 in, how nominal sizing works across lumber, plywood, pipe and brick, and why listings need real sizes.
- [Global Sources Image Requirements: Specs That Win Inquiries](https://www.sizemarker.com/blog/global-sources-image-requirements): Global Sources image requirements, decoded: the main-image, background, format, and file-size rules suppliers must hit to win inquiries.
- [How to Label Weight Capacity on Product Images Buyers Trust](https://www.sizemarker.com/blog/how-to-label-weight-capacity-product-images): How to label weight capacity on product images so B2B buyers trust the load rating: static vs dynamic load, safety factors, and where to place the number.
- [TikTok Shop Product Image Requirements (2026 Specs)](https://www.sizemarker.com/blog/tiktok-shop-product-image-requirements): TikTok Shop product image requirements for 2026: minimum size, 1:1 ratio, clean background rules, file limits, and why the still image still decides the sale.
- [Product Photo Callouts: How to Label Features Buyers Read](https://www.sizemarker.com/blog/product-photo-callouts): Product photo callouts done right: how many to use, how long, and the 6 rules that make feature labels convert instead of clutter the image.
- [Wayfair Image Requirements: Specs Suppliers Must Hit](https://www.sizemarker.com/blog/wayfair-image-requirements): Wayfair image requirements for suppliers: exact resolution, white hero background, image count, and the dimension rule that decides your return rate.
- [How to Show Product Size in a Photo Without a Model](https://www.sizemarker.com/blog/how-to-show-product-size-in-a-photo): How to show product size in a photo without a model: which scale tricks actually work, which mislead buyers, and the one that removes the guesswork.
- [Container Loading Quantity: How Many Units Actually Fit](https://www.sizemarker.com/blog/container-loading-quantity): Container loading quantity explained: calculate how many units fit a 20ft, 40ft, or 40HC container from carton size — and why the real number runs lower.
- [B2B Marketplace Image Requirements: The Specs That Matter](https://www.sizemarker.com/blog/b2b-marketplace-image-requirements): B2B marketplace image requirements compared: Alibaba, Made-in-China, and Global Sources specs, file limits, and the one image rule that wins inquiries.
- [Rug Size Returns: The Dimensions That Stop 'Too Small'](https://www.sizemarker.com/blog/rug-size-returns): Rug size returns almost always trace to one mistake: a rug too small for the room. Here are the standard sizes and the dimensions to show buyers to prevent it.
- [Folded and Assembled Dimensions: Show Both or Eat the Return](https://www.sizemarker.com/blog/folded-and-assembled-dimensions): Folded and assembled dimensions are the two sizes buyers confuse most: show only one and it does not fit becomes a return. Here is how to label both states.
- [Product Dimension Tolerance: How to Label ± Specs Buyers Trust](https://www.sizemarker.com/blog/product-dimension-tolerance): Product dimension tolerance decides whether an overseas buyer trusts your spec or files a mismatch claim. Here is how to set, state, and label the ± band by material.
- [Product Catalog for the Canton Fair: A Prep Playbook](https://www.sizemarker.com/blog/canton-fair-product-catalog-prep): Build a product catalog for the Canton Fair that wins follow-up orders: 2026 phase dates, what buyers keep, and a spec-diagram prep checklist.
- [Made-in-China.com Product Images That Win Inquiries](https://www.sizemarker.com/blog/made-in-china-product-images): How to prepare Made-in-China.com product images that win buyer inquiries — image standards, the spec diagram buyers look for, and mistakes to avoid.
- [Shoe Size Conversion Chart That Actually Cuts Returns](https://www.sizemarker.com/blog/shoe-size-conversion-chart): A shoe size conversion chart for US, UK, EU and CM — plus why length-only charts miss the width problem that drives most footwear returns.

For the complete article list, see https://www.sizemarker.com/llms-full.txt

## Legal
- [Terms of Service](https://www.sizemarker.com/service/terms)
- [Privacy Policy](https://www.sizemarker.com/service/privacy)