--- title: "RRB photo and signature size" description: "Prepare CEN 07/2024 Isolated Categories photograph, signature and optional SC/ST certificate PDF files from the official RRB Isolated Categories upload rules." canonical: "https://sarkaridoc.com/exams/rrb-isolated-categories/" generated: "2026-09-04" --- [Home](https://sarkaridoc.com/) [Railway](https://sarkaridoc.com/exams/railway/) RRB # RRB Official Kit Railway Recruitment Boards · 2024 Resize your photo, signature and certificate PDF (optional) here. Sizes come from the official notification. Submit on the official portal. Applications 7 Jan 2025 – 6 Feb 2025 Closed Correction window Exact dates not published as of 4 Sept 2026 [Official rules](https://sarkaridoc.com/exams/rrb-isolated-categories/#sources) Checked 4 Sept 2026 ### Your documents 0 of 2 files ready Photograph Required JPG · 320 × 240 px · 40–70 KB Dimensions 320 × 240 px at 100 DPI Max size 40–70 KB Format JPG Crop Center crop, center focus White or light background. Tap to add photo Upload photographor pick from your device. Pasting a screenshot works too. JPG or PNG. Select file Advanced settings320×240 px · 40–70 KB · JPG · center focus Dimensions px File size KB Format JPGPNG Reset to spec How to prepare 1. Use a recent colour passport photograph with white or light background. 2. Wear non-white clothing, preferably dark colour. 3. Avoid cap, hat, sunglasses, marks, dates or text on the photo. Source: Official RRB CEN 07/2024: photo 35 mm x 45 mm or 320 x 240 pixels, JPEG, 40-70 KB. Signature Required JPG · 140 × 60 px · 30–70 KB Dimensions 140 × 60 px at 100 DPI Max size 30–70 KB Format JPG Crop Wide crop, center focus White paper background. Tap to add signature Upload signatureor pick from your device. Pasting a screenshot works too. JPG or PNG. Select file Advanced settings140×60 px · 30–70 KB · JPG · center focus Dimensions px File size KB Format JPGPNG Reset to spec How to prepare 1. Sign on white paper with black ink only. 2. Use running letters, not block or capital letters. 3. Keep the full signature visible in the centre of the image. Source: Official RRB CEN 07/2024: signature 50 mm x 20 mm or 140 x 60 pixels preferred, JPEG, 30-70 KB. SC/ST certificate PDF Optional PDF · up to 500 KB Max size up to 500 KB Format PDF Tap to add photo or PDF Upload sc/st certificate pdfor pick from your device. Pasting a screenshot works too. PDF, JPG or PNG. Select file Advanced settings≤500 KB · PDF File size KB Max 100 KB 200 KB 500 KB Reset to spec How to prepare 1. Use this only if the application asks for the SC/ST certificate for free rail travel. 2. Existing PDFs are validated for type and size; uploaded images can be converted into a new PDF. 3. Make sure the certificate is valid, legible, clear, latest and in the prescribed format. Source: Official RRB CEN 07/2024: SC/ST certificate upload should be PDF format and up to 500 KB. 0 of 2 files ready Download package ### Your documents 0 of 2 files ready Photograph40–70 KB · JPGRequired Signature30–70 KB · JPGRequired SC/ST certificate PDFup to 500 KB · PDFOptional Download package ## About RRB RRB CEN 07/2024 Isolated Categories needs photograph, signature, and an optional SC/ST certificate PDF. Railway exam applicants who need a photo, signature or applicable certificate upload to match RRB online application validation rules. Conducting body Railway Recruitment Boards Official portal RRB online application ## Sources - [RRB CEN 07/2024 Isolated Categories official notification](https://rrbsecunderabad.gov.in/wp-content/uploads/2025/01/Final_CEN_Isolated_Cat-Pub-1.pdf) Checked 4 Sept 2026 · notice dated 6 Jan 2025 Where each rule is written Each file below links to the exact section of the official PDF where its rule is written. - [photo · Photograph and Signature Upload - Specification for Photograph](https://rrbsecunderabad.gov.in/wp-content/uploads/2025/01/Final_CEN_Isolated_Cat-Pub-1.pdf) 4 Sept 2026 Photo should be colour passport photograph, 35 mm x 45 mm or 320 x 240 pixels, JPEG, minimum 100 DPI, and 40-70 KiB. - [signature · Photograph and Signature Upload - Specification for Signature Image](https://rrbsecunderabad.gov.in/wp-content/uploads/2025/01/Final_CEN_Isolated_Cat-Pub-1.pdf) 4 Sept 2026 Signature should be JPEG, minimum 100 DPI, 50 mm x 20 mm or 140 x 60 pixels preferred, and 30-70 KiB. - [certificate PDF · SC/ST Certificate Upload](https://rrbsecunderabad.gov.in/wp-content/uploads/2025/01/Final_CEN_Isolated_Cat-Pub-1.pdf) 4 Sept 2026 SC/ST community certificate for free rail travel should be PDF format and up to 500 KiB. - Photograph Read as: notice says 40 KB; stored as KiB - Photograph Read as: notice says 70 KB; stored as KiB - Signature Read as: notice says 30 KB; stored as KiB - Signature Read as: notice says 70 KB; stored as KiB - SC/ST certificate PDF Read as: notice says 500 KB; stored as KiB Notice history · 2 changes since Sept 2026 - 4 Sept 2026 Re-verified CEN 07/2024: photo (35mm x 45mm or 320 x 240px, JPEG, min 100 DPI, 40-70 KB), signature (50mm x 20mm or 140 x 60px, JPEG, min 100 DPI, 30-70 KB) and SC/ST certificate PDF (up to 500 KB) all unchanged. Checked corrigenda 1-4 (PwBD, educational qualification, general updates, Librarian eligibility/timelines, published 2025-02-03 to 2025-02-25) -- none touch photo/signature/certificate specs. No newer isolated-categories CEN found. rrbbhopal.gov.in (the original cited host) is unreachable -- TCP connect times out. CEN 07/2024 is published byte-identical across RRB board sites, so the citation moved to the reachable rrbsecunderabad.gov.in mirror (same 109-page document, same page 20/21 spec section). [View source](https://rrbsecunderabad.gov.in/wp-content/uploads/2025/01/Final_CEN_Isolated_Cat-Pub-1.pdf) - 2 Sept 2026 Monitoring/source URLs moved from www. to the bare host: the RRB certificates cover only the bare domain, so www. fetches failed TLS hostname checks. [View source](https://rrbcdg.gov.in/) [View the source log](https://sarkaridoc.com/sources/) ## Questions about RRB What is the RRB photograph size? JPG, 320 × 240 px at 100 DPI, 40–70 KB, as listed in RRB CEN 07/2024 Isolated Categories official notification. What is the RRB signature size? JPG, 140 × 60 px at 100 DPI, 30–70 KB, as listed in RRB CEN 07/2024 Isolated Categories official notification. What is the RRB SC/ST certificate PDF size? PDF, up to 500 KB, as listed in RRB CEN 07/2024 Isolated Categories official notification. The source does not fix a pixel size for this file, so keep it clear and easy to read. What if RRB photo upload failed? First check the current official notification. Then resize the rejected photo on this page and upload the new file on the portal. White or light background. Is this an official website? No. This is a helper page built from official sources. 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