Glossary · Last updated May 3, 2026
Aspect Ratio
The ratio of image width to height. Standard jewelry product aspect ratios: 1:1 square (Amazon, Etsy primary, Instagram Shop), 4:5 portrait (Instagram feed-optimized), 16:9 landscape (TikTok Shop carousel), 3:4 portrait (Shopify and eBay mobile). Aspect ratio affects both platform acceptance and perceived product size, square ratios feel stable, portrait ratios feel more premium.
The four ratios that actually matter
1:1 (square) — Amazon main image, eBay listing, Etsy thumbnail; the universal marketplace ratio. 4:5 (portrait) — Instagram feed grid; takes more vertical space than 1:1, more thumb-stop. 9:16 (full portrait) — Instagram Reels, TikTok, YouTube Shorts, Pinterest pin grid; the dominant social format and the only ratio that fills a phone screen. 16:9 (landscape) — YouTube thumbnails, hero banners, web headers; rarely used for product photography but sometimes for lifestyle-context shots.
Why ratio matters more than image size
Resolution can be downscaled losslessly; aspect ratio cannot. A 1:1 image cropped to 9:16 either letterboxes (black bars) or center-crops (loses the sides). Both penalize engagement: letterboxed Reels are often skipped within 0.5s; cropped product photos may cut off prongs, chain links, or the entire piece. Right ratio at capture time means no late-stage cropping panic.
How AI handles ratio conversion
Generic image AI converts ratio by extending the image (outpainting the new pixels) or cropping. Jewelry-aware AI does it differently: it recognizes the piece as the subject, recomposes the frame around it (adjusting margins / surface / props), and avoids stretching or content-aware-fill artifacts. Same SKU, multiple ratios, all with the piece in its right framing. Output ratio is chosen at the seller's request — square for Amazon, 9:16 for Reels — from a single source image.
Common-mistake checklist
Avoid: shooting square only (cuts you out of Reels). Avoid: shooting 9:16 only (cuts you out of marketplace listings). Best practice: capture at the loosest reasonable framing (4:3 or 3:2 native camera) so the same source can be cropped to multiple targets without losing edge content.
See it in action
Related terms