What can I do with old clothes?

I have a box of clothes that can’t be taken to the op shop because they have some sort of personalisation (e. g. with my name on it, souvenir t-shirts from rowing regattas or old sporting uniforms). I’m sick of them sitting in a box taking up room, but I can’t donate them and I don’t want to throw them out.
Any creative ideas?
I also don’t really want to donate them because they all have some sort of sentimental value