I know Fiverr gig image size 550-370 but when I create this in photoshop There are some places nearby gap, what to do now
550x370 is the perfect image size. There are no spaces or bars if you use the Fiverr recommended dimensions. If you are still facing any issues, use these dimensions:
3000x2018 px. They should work perfectly. You can change the image size but make sure to not constrain the aspect ratios.
Thanks for your support,