My Design looks different in the Spreadshirt editor

My design just consist of text with an outline but for some reason the outline appears much smaller in the editor than it actually is. Why is that so?![34124141|673x367]

This looks like you forgot to remove the white inside from the design. Check your source file whether you removed everything you didn’t want to have in the design.And make sure you convert every outline into a shape with the required thinckness of 1.5mm minimum for vector designs…