I have a Cane Corso and he wights about 120-130 and the 3X fits him. How ever, I had to put a pin on the bottom because it was covering his private part. If they made a 4 or 5X, it might have helped. But other wise, it is cozy. I will be adding a video to his YouTube at Lightning Zeus Cane Corso and I will name it Cane's first pijamas.If your dog's tail is down, sometimes it might cover his tail. I will put hase a few from different companies to see which is best and I will also make a video as I go along.We recently learned that our dog has hypothyroidism & has completely lost her undercoat. She’s always curling up into a tiny ball, like she’s cold. If we cover her with a blanket, she’ll sleep there for hours. I got these pajamas to help keep her warm. She loves them so much that I got her another one. It’s soft & stretchy and she looks so cute! Easy to put on, too.This type of animal apparel is typically recommended for dogs with short fur but it fits my Great Pyrenese/Border Collie mix great. I've got her in the XL and it's not tight on her anywhere. The material is very light and breathes well. We live in Texas, it's hot and humid. She is not bothered wearing this outside. She goes potty just fine with this and doesn't make a mess of her PJ's.Back story, the reason I'm putting my dog in PJ's is not some random thing I craved to see on her but a vet recommendation to help me with controlling her licking. She's a very neurotic dog as it is, but when she's got a hot spot, she's too smart for her own good. She gets around her cone that is 2 sizes too big for her. Her hot spot is on her hip. She has still tried to lick it but she has not been able to lick the scab off. So big win there. But also I'm finding she seems less neurotic in her PJ's. I think this is helping her anxiety, so we may continue to wear them after the hot spot heals.Great Pyrenees (85 lbs) had her second torn cruciate (ACL) and kept rubbing her collar cone over the stitches, irritating the suture area. Ordered these surgery PJs to see if that would help. The PJs are extremely soft material. It was a little tough putting them on the first time, just because I wasn't sure what to do. They are snug, but think that helps. Caught her only once starting to chew on one of the leg bottoms, other than that, she left it alone. No issues going to the bathroom when wearing and not getting anything on the PJs. Slip on head first, front legs, then back legs. Comes off in the reverse order. It was a nice break from the collar cone and she seemed much happier with the PJs on. The PJs legs were long enough to cover the stitches for the ACL repair.It fit ok other than the tail part. it kept going over her lil tail and coving up her butt.Clearly a great product - rushed to order another one for my bigger pittie pup. Ordered XL and fit perfectly for my 33” measurements. Would like to see this style w/o the back legs; only found the hotter styles available.I was hesitant on if this would fit my 100 lb lab but I took a chance and I am 100 % pleased. I needed something to cover stitches on his back and back upper rear leg so he would not lick. It was hard to find something that would fit appropriately on the leg and not gap open to allow him to lick on it when laying down.This outfit was a blessing and it was sized and cut out perfectly.I originally wanted something more boyish but this design was the only one available next day (I was on a time crunch)Another product I ordered did not fit well at all so I am thankful this product worked out perfectly.I ordered the xxl.Hard to find things for larger breeds .Our Pit is 45 pounds, a slimmer build but with a Pit wide chest and the medium fits her perfectly. Not to loose, not to tight. Her measurements put her at the top of the medium and bottom of the large. I went with the medium and was happy with the fit. A large would have been to loose. She's able to move freely and she seems comfortable. Over all I'm happy. They are a stretchy material and not a regular cotton. This is the first piece of clothing for her that has fit so well. Would recommend them. I wish they had more colors and patterns to choose from though.Excellent for stopping the shedding going everywhere..legs are a bit too long and collar is a bit to wide for my beagle...but is very easy to put on and take offHas really helped our mix breed stop scratching and chewing a lot. She seems to enjoy wearing it as well. Nice tight fit and very light materialSuperbe qualitéSmaller than thoughtVestito perfetto e comodo