This article explains the recommended image sizes, resolutions, and file types to use when you add images, such as headshots and logos, to your signature in WiseStamp. Following these recommendations keeps your images sharp inside your WiseStamp signature while keeping the signature lightweight.
Recommended image specifications for WiseStamp signatures
Use these recommendations as a starting point for any image you upload to a WiseStamp signature.
Dimensions: 200×200px
File size: Up to 350 KB
Resolution: 72 DPI
Format: .png, .jpg, or .gif for animated images
To keep your images sharp on high-resolution displays, upload an image about 2x as large as you want it to appear in your WiseStamp signature.
Image size is ultimately a design choice — most company logos in WiseStamp signatures are somewhere between 60–100px. However, feel free to adjust the size to fit your overall signature design.
Why you should upload images at 2x the display size in WiseStamp
Most images in a WiseStamp signature display at around 100px wide. We recommend uploading your image to WiseStamp at roughly double that size — about 200px — for two reasons:
Sharpness on high-resolution screens. Higher-resolution images look better on Retina and other high-resolution screens when your WiseStamp signature is viewed.
Protection against email clients that ignore set dimensions. Some email clients display an image at its original size instead of the size defined in your WiseStamp signature. Uploading a larger image helps it still look correct when this happens.
Balancing quality and file size in your WiseStamp signature
Higher-quality images look better on high-resolution screens, but they also increase the overall size of any email that carries your WiseStamp signature. The right choice depends on your priorities: a higher-quality image gives a sharper result with a heavier email, while a smaller file keeps the email lighter with slightly less detail.
Adding a banner to your WiseStamp signature
Promotional banners are wider than logos or headshots, so they use different starting dimensions when you add them to your WiseStamp signature. Use these recommendations as a starting point:
Dimensions: around 600px wide and 100–200px high
Format: .png for banners that include a logo or text, or .jpg for photo-based banners
As with other images, upload your banner to WiseStamp at roughly 2x its display size to keep it sharp on high-resolution screens. Feel free to adjust the dimensions to fit your overall signature design.
Notes and limitations when adding images in WiseStamp
Keep these points in mind when adding images to your WiseStamp signature:
Images in WiseStamp signatures are not responsive on mobile devices.
Background images and overlapping images are not supported in WiseStamp signatures.
Embedded images keep your images visible in clients like Outlook, but they increase the overall email size.