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How to resize a signature to 10–20 KB for online forms

By the Fusion Office team · Updated

Quick answer

Sign on white paper, photograph it, crop it tightly, then open Resize image, enter the dimensions the form asks for (for example 140 × 60 pixels), turn on Limit the file size and enter 20 KB. Check the result is above the minimum, usually 10 KB.

Sign and capture

  • Use a black or dark blue pen on plain white paper; ballpoint shows up better than a faint gel pen.
  • Sign in your normal running style, not in capital letters, a little larger than usual.
  • Photograph it in daylight from directly above, without your phone's shadow on the paper.

Clean, crop and resize

  1. 1Open Crop image and crop close around the signature, leaving a thin white margin.
  2. 2If the paper looks grey, open the Image editor and raise Brightness and Contrast until the background is white and the ink is dark.
  3. 3Open Resize image, choose Pixels and enter the size from the form, such as 140 × 60.
  4. 4Turn on Limit the file size, enter 20 KB and save as JPG.
  5. 5Check the result shows at least 10 KB. If not, raise the quality or dimensions slightly and resize again.

Common signature sizes

  • IBPS and SBI: 140 × 60 pixels, 10–20 KB.
  • SSC: 10–20 KB, about 4 × 2 cm.
  • RRB (recent notices): at least 140 × 60 pixels, 30–49 KB.

More detail for each exam is in SSC CGL photo and signature size and IBPS photo, signature, thumb impression and declaration sizes.

Frequently asked questions

Why does the form say my signature is too small in KB?

The file must be at least the minimum size. Resize it to larger dimensions or a higher quality so it lands inside the range.

Should the signature be on a transparent background?

Not for exam forms: they want a JPG with a white background. Transparent PNGs are for adding a signature to documents.