Trademark for a clothing brand
Most clothing brands file in class 25. Your brand name gets the protection, whatever the logo or design on a shirt happens to be.
How you use the name matters
A name printed large across a shirt can get refused as decoration. The USPTO wants to see it working as a brand: on a neck label, a hang tag, or next to a way to buy online.
Name first, logo later
Filing the words in standard characters protects the name in any style. Many brands add a logo filing once it's settled.
Selling your own store
Clothing itself is class 25. If you also run a shop selling other brands, that's a separate service class, and an extra fee.
Classes to look at
Questions
Can I file before I've sold anything?
Yes, on intent to use. You show real sales before it registers.
We're not a law firm or a tax adviser. This is general information, not advice for your situation.
Protect your name
File a trademark$200 + USPTO fee. An attorney reviews and files it.