Where can I buy good quality plain cotton t shirts from?

[Sunflower6]

I used to buy my plain cotton t shirts from m&s but they've changed the design and they are all too long in the sleeve and ill fitting now.

Where else can I buy nice quality plain cotton t shirts from in a v neck or scoop neck?

They had loads in Matalan yesterday - vests, short sleeves, long sleeves, round neck etc. Didn't look closely so not sure of the quality though.

I just bought one in CostCo because it was a lovely colour. However, it's a good shape, great length (no chance of riding up to show my tummy!), and 100% pima cotton.

Uniqlo, Boden or American Apparel.

H &M are pretty good although the sizing is weird