This butt plug trio is perfectly sized for beginners. and features a easy insertion. each plug has a curved. ergonomic base to help keep it in place and remove easily. The firm yet flexible material is slick with just a hint of give. and is phthalate-free and cleans easily. Smooth plug: 4.5 inches in total length. 4 insertable. 1 inch in diameter. Bubble plug: 4.5 inches in total length. 4 inches insertable. 1 inch in diameter. Single bead plug: 3.75 inches in total length. 3.5 insertable. 1 inch in diameter.