Lower EastMen's Boxer Shorts (Pack of 6)

I am 42" waist and so what size should I order.

Is this product 💯 cotton including the waistband?

Dear amazon. please tell me is these are uk size boxers, what waist size is m and l . also will i get the same colors as showing in the picture.

I'm 39" waist, want to purchase lower east shorts, what size best?