Mason Pearosn Pocket Bristle B4 hair brush is ideal for fine to normal hair of short to medium lengths, or as a second brush for on the go use for hair of any length. 5 rings (Pocket) of natural, pure boar bristle (B) tufts. Designed with a unique rubber cushion pad, made by hand using Mason Pearson’s original techniques, allows for effective and efficient brushing. It is kind on the hair to use and massages the scalp. Overall size 6 3/4 inches by 2 inches.