QUESTION: By seat depth, you are measuring from the back of the chair towards the front of the seat where your knees would stick out correct? We have a skinny opening to our shower (glass doors) and this is the skinniest seat that we've found. Just want to be sure I'm measuring the same as you are. Thanks! ANSWER: Yes, you are right - seat depth is from back to front measurement of the seat. For more discussions, options and details about the product, or to order the product, please click here Ideal for sick children or young adults. The sliding and swivel functions and extra cushion foam belt make shower easier and safe. Swivel seat enables user to turn every 90 degrees before getting in and out of the bathtub or shower. Makes patient transfer even easier and safer. Double safety locks on each side of bench allows user to get on the bench safely before sliding to the other side and locking the bench while inside the tub or shower. Height adjustable in 1/2" increments. Extra cushion foam belt for safety. Seat Width: 16" Seat Depth: 13" Actual Slide: 15" Base Width: 34" - 35" Easy Assembly: Yes Seat Height: 18" - 22.5" Required Clearance: 14" - 18" Weight Capacity: 250 lbs.