Life Is Good Sleep heather gray button up short sleeve + short pajamas

Sorry if I missed anything. Please ask any questions before buying.  Says size medium,  shirts fit more like a small.  This is an older listing, I may need to check this pajama set for imperfections I may have missed. Brand: Life Is Good sleep Please ask any questions before buying  Heather gray button up short sleeve top and short pajama set w/ periwinkle piping detail. Has a coffee graphic on a small working pocket on the top. Top and shorts are both very stretchy. Shorts have a lot of elastic at the top. Has a small pull on the inside of top, pull isn’t able to be seen from the outside (pictured).  Says size medium but fits more like a small (see measurements). Cute and comfy. Fair condition. Made in China.  Materials: 95% polyester 5% spandex   Flat Measurements: (All measurements are approximate) Top: (All are with top buttoned up) Armpit to armpit: 20 1/2 inches  Sleeve opening: 7 inches  Length from collar to bottom of garment: 23 inches   Shorts: Waist: 13 inches  Leg opening: 12 inches  Length from waist to bottom of garment: 12 inches