We bought for ds. But we had a wedding to go to about 3 weeks later, and, as it turned out, a funeral too.
We bought fairly cheaply though as knew he was in a growth spurt.
What will he be doing for 6th form ?
Lots of schools round here insist on 'business wear' for 6th formers, so, if he doesn't have a growth spurt over the Summer, he can wear it to school.