Perfect for back door training and re-training! For those new to anal play or experienced pros-graduating glass plugs make it easy! Work pelvic floor muscles for better control, strength and endurance during sex. Start small, move to medium, then take on large with sensual ease. 3 different sizes small 4.55” x 1.15”. Medium 5” x 1.35” Large 5.75” x 1.5” . Made from durable, tempered borosilicate glass. Use with any of your favorite lubes, easy to clean.