yesterday i did a bit of diy-ing! and i'm pretty happy with the result! i'm already thinking of applying this to sweater & jackets. it's really easy to make this. all you need is a basic tee, scissors (and a sewing machine with double jersey needle if you choose to sew).
basically all i did was cutting in both of the sleeves, i also did some sewing because i didn't want the jersey to roll up. which it will do when you only cut the fabric. not much, just a bit. the sewing makes two cuttings more like round holes. just cutting gives it a different look, just straight lines (and edges). both options look really nice, and since it's so easy to make i'd say; grab your scissors!