Show It Right
Sell It Fast
Professional, precise size and spec annotations let buyers see every detail before they order. Build clear spec sheets in minutes, cut the questions and returns that come from size confusion, and turn that professionalism straight into sales.
Trusted by sellers on
Amazon
Shopify
Etsy
TikTok Shop
eBay
Temu
AliExpress
WalmartWhat is SizeMarker?
SizeMarker is a precise dimension and spec annotation tool. You mark exact measurements and specification labels directly on a product photo, then export platform-ready images — so buyers see every dimension before they order. AI only assists; the geometry stays accurate.
- Deterministic geometry keeps every measurement accurate — unlike AI image tools that restyle a photo but can't mark true sizes.
- Built for foreign-trade B2B suppliers and e-commerce sellers who need clear spec diagrams in minutes.
- Runs in your browser — no CAD, no design skills, no download.
Buyers Can't Read Your Sizes & Specs — So the Sale Stalls
Customers scroll past plain product photos. They can't tell the actual size, can't read the specs that matter, and B2B buyers end up messaging back and forth just to confirm dimensions. Size charts get ignored. Specs are buried in the description. A slick AI-generated image still can't get the measurements right. Your products are great — but the sizes and specs aren't being communicated.
The solution? Mark precise dimensions and specs right on the image. SizeMarker lets you add dimensions, specs, and bilingual labels in minutes and export platform main-image sizes — AI only assists, you stay in control of the accuracy.
Purpose-Built Annotation Tools
Everything You Need to Communicate Size & Spec
Dimensions, specs, marketing, and detail callouts — get the measurements exactly right, then make every selling point land.
Dimension Lines
Show buyers exactly how big it is — measured right.
The #1 reason for returns and B2B rework? Size didn't match expectations. Dimension lines display precise measurements directly on your product, and endpoints snap to the product outline — the deterministic-geometry precision generative AI can't fake.
- ✓Clean measurement lines with switchable units (mm/cm/inch)
- ✓Endpoints snap to the product outline — no shaky alignment
- ✓Multiple dimension styles and dual primary/secondary units
- Dimension linesSnap-to-edge measurements in real units
- Spec labelsBilingual specification tags
- Focus zoomMagnify the detail buyers must see
- Marketing calloutsSelling-point badges on the image
- Contour outlineTrace the product edge for emphasis
- Step numbersNumbered sequences for assembly guides
- Angle marksShow opening and tilt angles
- Area labelsMark surface area on the image
- Basic shapesBoxes, circles and simple marks
- Redact & blurMosaic or hide sensitive parts
What SizeMarker Solves
From Unreadable Sizes to Precise Spec Sheets
Why Precise Annotation Wins
A Pretty Photo Isn't Enough. Buyers Need It Measured.
Your competitors are still uploading raw photos or AI-generated images. Precise dimension and spec annotation is your edge at closing the sale.
For Suppliers and Sellers Alike
From B2B suppliers to online sellers — SizeMarker fits every product annotation and listing workflow.
B2B Suppliers & Wholesalers
Alibaba, Made-in-China and 1688 suppliers turn a product photo into a bilingual spec sheet in minutes — quote, negotiate, and list in one step.
Amazon & Shopify Sellers
Create listing-ready images with precise dimensions, specs, and labels — no designer needed.
Brands & Agencies
Scale infographic production across product lines with consistent, on-brand templates.
Dropshippers
Transform plain supplier photos into professional infographics that look like you have a design team.
Exact specs on any product photo — no CAD
From furniture and industrial equipment to building materials — any product where size decides the sale.
Furniture
Assembled and packed sizes, materials, and weight capacity — so buyers know it fits before they order.
See howIndustrial equipment
Exact dimensions, port positions, and technical specs procurement can quote from — no CAD needed.
See howBuilding materials
Size, thickness, and coverage marked clearly, so contractors order the right quantity.
See howAny product
Turn any product photo into a bilingual spec sheet sized for Alibaba, 1688, and Amazon.
See howWhy SizeMarker
You Need Precise Specs, Not an AI-Faked Image
AI image tools can swap backgrounds and scenes, but can't get the measurements right. SizeMarker uses deterministic geometry to mark sizes and specs precisely — AI only assists.
- ✓Endpoints snap to the product outline
- ✓Deterministic geometry — sizes never miscalculated
- ✓Bilingual specs, exported in one pass
- ✓One-click export for Amazon, Alibaba, 1688 sizes
- ✓AI only assists — you control the accuracy
- ✓100+ category spec-sheet templates
- ✗Sizes are guessed, often wrong
- ✗Change the angle and dimensions warp
- ✗Spec text comes out wrong or garbled
- ✗Export sizes set one by one, by hand
- ✗All on the model — accuracy out of your control
- ✗No spec-sheet templates
See the Difference
Same Photo. A Completely Different Deal.
Let buyers grasp size and spec in 5 seconds — fewer questions, less rework, faster checkout.
A plain product photo. Looks fine, but customers scroll past with unanswered questions:
- How big is it? Will it fit my space?
- What are the exact dimensions?
- What material is it made of?
The same photo, turned into a spec sheet in seconds:
- Precise dimension lines show exact measurements
- Bilingual spec parameters at a glance
- Exported at Amazon / Alibaba / 1688 main-image sizes
Pricing
Simple, Transparent Pricing
Start free and make spec sheets, upgrade when you need more.
Free
Create your first spec diagrams
- ✓All 10 annotation tools (dimensions, angles, area, shapes, contour, redaction, labels, focus, steps, callouts)
- ✓70+ built-in preset styles
- ✓Image & video export up to 2K
- ✓AI assists: background removal, dimension & contour detection
- ✓30 credits on sign-up
- ✓Original aspect ratio only · export carries a watermark
Pro
Professional spec diagrams at scale
- ✓Everything in Free, fully unlocked
- ✓All 10 annotation tools
- ✓70+ built-in preset styles
- ✓Save unlimited custom & brand presets
- ✓Watermark-free export
- ✓Batch export to multiple aspect ratios & custom sizes
- ✓Export sizes for Amazon, Alibaba, TikTok, Instagram & more
- ✓Early access to new tools
- ✓Priority support
Enterprise
Shared workspace for teams
- ✓Everything in Pro, fully unlocked
- ✓Shared team workspace & project collaboration
- ✓Member & seat management with roles
- ✓Shared template & preset library
- ✓Dedicated support
Is Pro Worth It for You?
Slide to see how much you could save by reducing returns
FAQ
Common Questions
What formats does SizeMarker support?
SizeMarker supports all major image formats (JPG, PNG, WebP) and video formats (MP4, MOV, AVI, WebM). Export infographics optimized for Amazon, Shopify, TikTok, Instagram, and other platforms.
Do I need design skills?
Not at all. SizeMarker is built for e-commerce sellers, not designers. Pick a preset, click to place, and your infographic is ready. Most sellers create their first product infographic in under 5 minutes.
How does the subscription work?
SizeMarker offers flexible monthly and yearly plans. Cancel anytime, and get 2 months free with annual billing. Your subscription includes all updates and new annotation tools.
How is this different from AI image generators?
AI image tools (background removal, scene swaps) make photos look nicer, but can't get sizes right and often garble specs. SizeMarker uses deterministic geometry to mark dimensions and specs precisely — AI only assists by suggesting lines, snapping to the outline, and estimating sizes, while you stay in control of the accuracy.
Can I customize styles to match my brand?
Yes. Every infographic tool offers full customization — colors, fonts, sizes, and animations. Save custom presets as templates for consistent branding across all your product content.
How long does it take to create an infographic?
Most sellers create their first product infographic in under 5 minutes. With saved presets, subsequent infographics take 2-3 minutes.
Can it produce engineering drawings or import CAD?
SizeMarker is focused on spec sheets for selling and closing deals — not engineering drafting. It doesn't import CAD/DXF or implement GD&T tolerance systems. For toleranced engineering drawings use dedicated CAD; SizeMarker makes the customer-facing dimension and spec sheets fast and accurate.
What's the difference between Free and Pro plans?
Free includes all 10 annotation tools with 70+ preset styles and image & video export (with a watermark). Pro adds watermark-free export, custom & brand presets, batch export to multiple aspect ratios (Amazon, Alibaba, TikTok, Instagram), and 1,500 monthly credits for AI features.
Make Precise Spec Sheets That Close the Sale
Let buyers see the size, read the specs, and order with confidence.
Free to start · No credit card · Cancel anytime