Photos never leave your device
There is no server. All processing happens on-device — your photos and records are never uploaded.
No server · Photos never leave your device
Measure clothes from one photo
Measure clothes without a tape. Put an A4 sheet or a card next to the garment and take one photo.
How it works
- 1
Photograph together
Place an A4 sheet or a card on the same flat surface as the garment and take one photo. Need detail shots? Keep shooting with the level camera or add more from your album.
- 2
Find the reference
Otja finds the four corners and corrects perspective. If auto-detect struggles, tap the corners yourself.
- 3
Connect two points
Pick a category to get fields like shoulder width, chest width, and length. Connect two points to see the value in cm or inches.
- 4
Export
Copy the size chart, save or share the measurement image and detail photos in one go, or keep a record per item.
Why Otja
Several photos, one record
Shoot a series with the level camera or pick from your album — up to 12 per record. Tidy the order, remove backgrounds, then choose the photo to measure.
Built for secondhand sellers
Get the length, shoulder width, and chest for listings on eBay, Depop, Vinted, or Mercari from one photo. Copy the size chart straight into your listing.
Keep your own sizes on file
Measure the clothes that fit you best, then compare with any listing’s size chart. Fewer sizing mistakes, fewer returns.
Honest about accuracy
Accuracy depends on how you shoot. Lay the garment flat, keep the reference on the same surface, and shoot as close to straight-down as you can. A large reference like A4 paper is recommended. The app warns you when you choose a small reference like a credit card, where long measurements may be less accurate.
One-time purchase
Otja Pro
Register an everyday object as a reference (like the iPad mini in the screenshot) and measure without an A4 sheet. A single one-time purchase unlocks unlimited records, custom reference objects, all templates, and watermark removal. Core measuring is free.