How can I adjust my logo size in the header without losing quality?

Hi, I’ve just changed my logo and when I uploaded it into the header it says recommended size is 400px wide. When I do this it’s too big. When I reduce the size the quality is bad. Is there anything I can do about this?

some themes has this issue, can you specify which theme you are using and if possible please upload your logo here so that I can check it on other themes

I’m using the supply theme.

Is this the correct way to upload the logo?

Hmmm… I think you should try to make a horizontal logo. you can remove that black background of the logo and just keep the logo on a transparent background. us dimensions 400*200 and see. If not working feel free to contact me

Yes, that worked perfectly. Thanks so much

Sounds good, feel free to contact me if you need any assistance for your shopify store