They are really thin now! At least the last one I saw was. Not like the doorstops of old.
I would heartily recommend a Trezor. There is nothing quite like stashing a few coins away every now and then and seeing it mount up. The non touchscreen ones are 50 eurosish and they take crypto so it's a win win!
I wouldn't mind finding a music shop in the UK that took crypto. That would be me rekt!