SheepStop tees are made from 100% super combed Bio cotton. They are smooth and soft on your skin.
100% cotton does shrink! But the shrinkage is so negligble that you will not experience any change.
Measure a t-shirt that fits you well and choose the closest size to it from the chart below
All measurements shown in inches (unless specified). Diagram not to scale.

Guys/Girls Straight Fit Tee Size
S M L XL XXL
Length 24.5 25 26.5 27 28
Width 19 20 21 22 23
'Shirt' size (cm) 37 39 40-41 42-43 44

Girls Slim Fit Tee Size
S M L XL
Length 23 24 25 26
Width 16.5 17 18 19
Bust Size 33 34 36 38