This lovely granny square vest comes in 3 different sizes: S/M  L/XL  2XL/3XL. The chest circumference of each size is approximately 96cm / 37.8”  112cm / 44”  128cm / 50.3”. I’ve designed this vest to fit loosely. Are you in between sizes? Then opt for the larger size.
 
I've used Hobbii yarn Fluffy Day XL. Instructions are written as well as charts provided.