Super fun Button Brigade Pineapple Shirt - this is a brand that had a kickstarter a couple years ago for their gender neutral and size inclusive shirts. I don’t think they are currently making/selling shirts, but I loved wearing them to work at the peak of my fun short-sleeved shirt era, haha. I never actually wore this one (I ordered it October 2020 and have never fully returned to office/dressing appropriately for the office when I am there). Their claim to fame is extra buttons to stop gapping in the chest and waist. The third picture is a model from their website wearing a size L, this shirt is a M. Measurements (from their page): chest 39-41, waist 37-38, hip 41-42.5, length 26.5