I ordered a "medium" and it fits me well; comfortably loose. I'm a 5'7", 150 lbs, slim man. All the stitching is nicely even and well done but single stitched. Will it last? I doubt it. But I'm skilled with a sewing machine. The lower pockets are flapped, of useful size, with velcro closure. The upper pockets are similar but too small to be terribly useful. My smallish Google Pixel phone will fit in the left but it's not deep enough for the flap to close. The right barely fits my glasses and its flap will also not close. This is typical of male garments from China; do they fancy that we are all "stamp" sellers? It's saving grace are the two transverse, zippered pockets just above the the flap of the lower pockets, which are of useful size, and the two very large open pockets along the central zipper. These reach between the back fabric of all the other pockets and the net lining. One could easily stuff a hat, light sweater or magazine in there. The covering of the back "window" unzips and rolls down, exposing the net lining, and is easily rolled into a thin pocket along its lower margin. Very neat and tidy. All the zippers are light duty; we'll see how long they last with my gentle, nurses hands.