On Fiverr, success begins with a strong gig image.
* (The top recommendation from Fiverr is to have a best The lowest Fiverr Gig Image size in 2022 is 712430 pixels, and the highest is 4000 x 2416 pixels. Thumbnail size is 1280x769 pixels (at 72 DPI). Also, files should not exceed 5Mb in size. The revised resolution for 2022 is as follows.)
The gig picture size for 2022 on Fiverr is 1280 x 769, with a 16: 9 aspect ratio.
Because Fiverr allows you to post thumbnails up to 5MB in size, you can use any resolution with this same aspect ratio to create a superb resolution thumbnail.
Use eye-catching photos that are crisp, clear, high-resolution, and stick out to potential customers. Avoid images that are pixelated, stretched, or otherwise "squished."