Standard Depth and made to fit snugger and stay on longer. Kids can't pull them off either. This felt base cap is durable, lasts 2-3 times longer than other types of caps, and has the felt base molded into the sturdy nylon cap material. Helps keep the shine on the floor longer, while extending the life of your chair glides. Reduces noise in the classroom too, meaning fewer disruptions. Fits glides with a 1-1/16 inch base. Perfect Felt Floor Protection.Shiffler Equipment Sales, Inc.