S: Length 45cm,Height 32.5cm,the two holes are 13cm away from the inside,and the two holes are 28cm away from the outside. M: Length 51cm,Height 37.5cm,the two holes are 16cm away from the inside,and the two holes are 32cm away from the outside.L: Length 57cm,Height 42.5cm,the two holes are 17cm from the inside,and the two holes are 34cm from the outside. Sturdy And Durable dog hammock helper is made of mesh textile material,the sling is sewn with a special process,not a rope ring design,do not worry about tearing and falling off. Professional Pet Grooming Kit : Nail clipper x 1(safety stop guard design),Nail file x 1,Double row pet comb x 1 (for short and long hair) ,Premium quality S-hook x 2 ( for round bars ),Hanging Sling x 2(suitable for the irregular bar ).These items and pet nail hammock is a perfect combination,which makes your work easy and comfortable. Convenient: As a pet owner,it is easier for you to give medicine to pets,clean their teeth and ears,and use eye drops when you have this dog grooming sling hammock at home. You don't have to worry about being bitten. Besides,grooming hammock is also a good helper for veterinarians.Comfortable:This pet grooming harness bag is designed with a breathable and flexible 3D mesh structure to keep your pet comfortable. The thicker hemming around the holes reduces friction on your pet's legs,making them calm and relaxed for grooming. In addition,this product is easy to clean,hand wash and machine wash. dog grooming hammocks are available in S,M,L sizes. So do not hesitate,buy it now Choose the right one for your pet