One does have a little pen mark but might come out, they are short sleeved.
34cm approximately 12-15 depending on child size.
Some other school that have pin stripes shirts but was a Blythe Bridge but has no branding so hopefully be useful for some one.
3 x Pin Striped Short Sleeve Shirts (Blythe Bridge ST11)
This offer has been gifted to someone and is no longer available.