Signature 10 to 50 KB — CUET's window and Rajasthan's 280 x 80 px box
A 10-50 KB signature is the roomiest window in common use — the risk is not the ceiling but the floor, and for Rajasthan the pixel range too.
Signature 10-50 KB specification
| Requirement | Value |
|---|---|
| CUET (UG) 2026 | Signature JPG between 10 KB and 50 KB; photograph 10-200 KB with 80% face |
| Rajasthan recruitment portal (RSSB / RPSC notices) | Signature JPG between 10 KB and 50 KB, minimum 280 x 80 px, maximum 560 x 160 px |
| Rajasthan signing box | 7 cm x 2 cm on white paper with a black or dark-blue pen, filled to the edges |
| Aspect ratio | Both Rajasthan bounds are 7:2, so crop to that shape before resizing |
| Pixel size that fits | 280 x 80 px sits at the Rajasthan minimum and usually produces 10-15 KB; go to 420 x 120 px if the file falls under 10 KB |
| Floor | 10 KB on both portals — an 8 KB file fails |
| Same portals, other files | CUET disability certificate PDF 50-300 KB; Rajasthan photograph 240 x 320 to 480 x 640 px at 50-100 KB |
Source: CUET (UG) 2026 Information Bulletin — image upload specifications (NTA) (CUET (UG) 2026 bulletin, published January 2026). checked on 2026-09-20. CUET gives no pixel box; the Rajasthan portal gives 280 x 80 to 560 x 160 px for the same KB range. The preset uses the Rajasthan minimum so one file satisfies both.
Two portals that agree on the bytes
Page 9 of the CUET (UG) 2026 Information Bulletin lists the signature as a JPG between 10 KB and 50 KB, alongside a photograph of 10-200 KB with the face filling 80% of the frame. The Rajasthan recruitment portal's upload guide gives the identical 10-50 KB window for its signature but goes further: the image must be at least 280 x 80 pixels and at most 560 x 160, and the signature should be made inside a 7 x 2 cm box with a black or dark-blue pen. Both bounds are 7:2, so the portal is really telling you the shape as well as the size.
The floor is the real constraint
Fifty kilobytes is a lot of room for ink on paper. A cleanly cropped 280 x 80 px signature is often only 10-14 KB, which puts it right on the floor rather than anywhere near the ceiling. That is the failure people do not expect: the portal says 'between 10 and 50' and refuses a 9 KB file. The fix is not to add noise or pad blindly but to give the image a little more to store — 420 x 120 px at quality 85 is comfortably inside the range on both portals and still well under the Rajasthan maximum.
One scan, several forms
Because the Rajasthan bounds bracket a range rather than a single size, a signature made to 280 x 80 px doubles as a CUET file, and a 560 x 160 px version is a good master to keep. If a later notice asks for the narrower 10-20 KB banking range or NTA's 10-100 KB window, re-export from the original scan rather than resizing a JPEG that has already been compressed once. The matching photograph rule for the Rajasthan portal — 240 x 320 to 480 x 640 pixels at 50-100 KB — has its own page at 240 x 320.
How it works
- Rule a 7 x 2 cm box on white paper and sign across most of it in black or dark-blue ink.
- Scan at 200 dpi or photograph from directly above with no shadow across the box.
- Crop exactly to the box so the image is 7:2 in shape.
- Resize to 280 x 80 px (the preset default) or up to 560 x 160 px if you want more detail.
- Set the range to 10-50 KB and confirm the badge shows a match — pad only if it falls under 10 KB.
- Download as JPG; the same file works for CUET and for Rajasthan recruitment forms.