Quality
Genuine soft leather

Highland
Jacobite Waistcoat

Beautifully tailored with satin lining
Two pockets and classic toggle fastening.
 
This stunning authentic leather waistcoat will compliment any highland kilt outfit.

These leather waistcoats are generally worn open, however when fastened the maximum chest measurement for each size (m, l, xl, xxl) would be:
 

Sizes
 
Medium        maximum chest 40
Large           maximum chest 42
X Large        maximum chest 44
XX Large      maximum chest 46

If you are a size 40 chest, a medium size would be on the tight side. 

Therefore you may find a size large to be more appropriate.