Fixing "Dimension is not correct. Width should be 6cm and Height should be 2cm"
Government recruitment portals (such as Staff Selection Commission, State Public Service Commissions, Police recruitment boards, and Banking examination servers) enforce strict image dimensions on scanned signatures. When a candidate uploads an uncropped photo from their phone, the automated validation script rejects the file with the error: "Dimension is not correct. Width should be 6cm and height should be 2cm (हस्ताक्षर का आयाम सही नहीं है. चौड़ाई 6 सेमी और ऊंचाई 2 सेमी होनी चाहिए)".
This tool solves that exact rejection by locking your cropping viewport to a fixed 3:1 aspect ratio, resampling the pixels to standard print density, and injecting genuine DPI tags directly into the JPEG file header.
6cm x 2cm Pixel Dimensions Across Standard DPI Resolutions
Because computer screens register pixels while examination forms specify centimeters, the conversion formula connects both via DPI (Dots Per Inch):
Formula: Pixels = (Centimeters / 2.54) * DPI
| Print Quality | Width in Pixels (6 cm) | Height in Pixels (2 cm) | Aspect Ratio | Recommended Application |
|---|---|---|---|---|
| 300 DPI | 709 pixels | 236 pixels | 3:1 | Standard high-resolution government portal mandate |
| 200 DPI | 472 pixels | 157 pixels | 3:1 | Compact upload limit requirements |
| 150 DPI | 354 pixels | 118 pixels | 3:1 | Restricted bandwidth forms (Under 10KB) |
| 100 DPI | 236 pixels | 79 pixels | 3:1 | Low-resolution web thumbnails |
Difference Between Image Dimensions and Embedded DPI
A common misconception is that calculating pixel dimensions ($709 \times 236\text{ px}$) automatically makes a JPEG "300 DPI". Standard HTML5 canvases discard DPI metadata and output generic 72 DPI or 96 DPI headers. Certain government upload scrutiny systems inspect the binary JFIF APP0 segment of the JPEG file. This tool directly modifies the file bytes before download, embedding the integer value 300 into the horizontal and vertical density headers.
How to Keep Signature Size Between 10KB and 20KB
- Sign on clean, unlined white paper using a dark black ink pen.
- Avoid casting smartphone shadows across the signature.
- Leave the resolution set to 300 DPI and select 10 KB to 20 KB in the Target File Size dropdown.
- Our compression algorithm balances JPEG quality to generate a sharp file that meets the size requirements.
Frequently Asked Questions (FAQ)
1. What is 6cm width and 2cm height in pixels at 300 DPI?
At 300 DPI, 6cm equals 709 pixels and 2cm equals 236 pixels. The exact dimensions are 709 x 236 pixels.
2. Can I resize a regular portrait passport photo with this tool?
No. Standard passport identification photos require a 3.5cm x 4.5cm ratio (approximately 413 x 531 pixels). This tool is locked to a 3:1 aspect ratio designed specifically for horizontal signatures, thumb impressions, and specimen marks.
3. Why did my transparent signature get a white background?
Government exam portals reject transparent PNG files. The JPEG specification does not support alpha transparency channels. Our tool fills transparent areas with clean white to ensure your signature is accepted by automated form validators.