Comparison · 2026
For accurate dimensions on product photos, not just good-looking graphics.
SizeMarker puts accurate, snap-to-edge dimensions and specs on a product photo and exports it at marketplace sizes. Canva is the general design suite for marketing graphics. They solve different problems, and plenty of sellers keep both.
| Dimension | SizeMarker | Canva |
|---|---|---|
| Primary purpose | Dimension & spec annotation | General graphic design |
| Measurement accuracy | Snap-to-edge lines, scale-aware | Manual lines, typed numbers, no scale |
| Marketplace export presets | Built-in (Amazon 2000², Alibaba 1000²) | Manual canvas sizes |
| Bilingual spec labels | One label holds both languages | Manual text boxes |
| AI role | Assists placement, never invents numbers | Generative design & image tools |
| Template / asset library | Focused annotation presets | Very large |
| Learning curve | Low | Low |
| Runs in browser | Yes (+ desktop app) | Yes |
| Price | Free · Pro $19.90/mo | Free tier · paid plans |
Say you export furniture and need a sofa photo with width, depth and height marked, sized for an Amazon main image.
In SizeMarker: upload the photo, draw three dimension lines (each endpoint snaps to the sofa’s edge), add a fabric label, and export at Amazon’s 2000px size. It takes a few minutes, and the measurements stay aligned if the image is resized.
In Canva: drop the photo on a canvas, draw lines by hand, and type the numbers into text boxes. It can look clean, but nothing ties a line to a real length or snaps to the edge, so one mistyped number goes unnoticed. There is also no marketplace-size preset.
Canva is the stronger tool for social posts, decks and brand graphics, with a far bigger template library. SizeMarker is not trying to replace it there. It does one narrow thing: dimensions a buyer can trust.
For adding dimensions and specs to product photos, yes. For general graphic design, no — Canva is the broader design tool. Many teams use Canva for marketing and SizeMarker for accurate spec diagrams.
Only by hand. Canva lets you draw lines and type numbers, but it has no measurement scale and nothing snaps to the product edge, so nothing catches a size you get wrong.
SizeMarker, when the image needs accurate sizes: it snaps dimension lines to the product and exports at each platform’s main-image size. Canva is better for lifestyle and promotional graphics.
SizeMarker is free to start, with Pro at $19.90/month. Canva has its own free tier and paid plans. Pick by the job, not just price — they solve different problems.
Often, yes. Use Canva for marketing graphics and SizeMarker for accurate spec and dimension images. They complement each other rather than compete.
