RRB ALP (Assistant Loco Pilot) Signature Size 2026

Rules for the signature

• Signature 30–49 KB

  min 140×60 px · JPG · 200 DPI

  • Black ink on white paper
  • Running (joined) handwriting, not block or capital letters
  • At least 140×60 pixels, scanned at 100 DPI or more
  • Centred inside a 35×20 mm box
  • Must match your signature at the exam, DV, medical and joining

  Note: Minimum 140×60 px. At that size a clean signature makes too small a file, so we enlarge it step by step (up to 600 px wide, usually about 600×257 px) until it reaches the 30 KB minimum.

Tip: Sign in running handwriting with a black pen on white paper, inside a 35×20 mm area. Fill the area.

RRB ALP (Assistant Loco Pilot) signature: what is specific to this exam

These RRB ALP (Assistant Loco Pilot) 2026 rules come from the RRB notice “CEN 01/2026 (Assistant Loco Pilot)”, page 18, last checked on 22 Oct 2026. The RRB ALP (Assistant Loco Pilot) form usually opens around May–June.

From our RRB ALP (Assistant Loco Pilot) notes

• RRB Assistant Loco Pilot (CEN 01/2026) uses the current RRB pattern: no photo upload, a live photo in the form, and a signature with an unusual minimum size. The CEN 01/2026 form was open from 15 May to 14 June 2026.
• 30–49 KB. Note the minimum: most exams fail you for being too big; RRB also fails you for being too small.
• A clean signature normally compresses to 10–20 KB, which is under the RRB minimum. SahiSize first makes the image bigger (step by step up to 600 px wide, usually about 600×257 px), then raises quality, and only if still needed adds invisible padding until it reaches 30–49 KB. The signature looks the same.
• Your uploaded signature is compared at each CBT, the aptitude test, document verification and the medical. Sign the way you sign attendance sheets, not a slower, neater version you will not repeat.
• Non-white background, non-black ink, block or capital letters, poor resolution, incomplete signature, a thumb impression in place of a signature, or someone else's signature. Each one can cancel the application at any stage, even after the exam.

RRB ALP (Assistant Loco Pilot) signature compared with similar exams

• RRB NTPC (Graduate) and RRB Group D (Level 1) use the same signature size as RRB ALP (Assistant Loco Pilot) (min 140×60 px · 30–49 KB · JPG), so one file passes all these forms. RRB NTPC (Graduate) sizes · RRB Group D (Level 1) sizes
• Unlike SSC GD Constable, which wants 709×236 px · 10–20 KB · JPG, RRB ALP (Assistant Loco Pilot) wants min 140×60 px · 30–49 KB · JPG. Make a separate file for each form. SSC GD Constable sizes

Upload errors and how to fix them

These are the messages the RRB ALP (Assistant Loco Pilot) portal shows. Each one has a fix.

Error: File size should be between 30 KB and 49 KB

Fix: A clean signature is usually 10–20 KB, so it fails the 30 KB minimum. SahiSize first enlarges the image (still at least 140×60), then raises quality, and only then adds invisible padding until it reaches 30–49 KB.

Error: Signature written in BLOCK or CAPITAL letters instead of running handwriting

Fix: This is an official rejection ground. Sign in joined, running handwriting the way you sign a cheque.

Error: Use of non-black ink for the signature

Fix: Blue ink is not allowed for RRB. Sign again with a black pen.

RRB ALP (Assistant Loco Pilot) signature questions

Other RRB ALP (Assistant Loco Pilot) documents

• SC/ST certificate (free travel pass) size details