From Sinclair Institute.Medical-grade silicone is body-safe, phthalate-free, PVC-free and latex-free. High-quality, skin-like softness warms quickly to body temperature with contact. Comfortable tapered tips designed for ease of insertion.5 graduated sizes for natural and effective transition and progression.Large bases add control and leverage.6-language instruction booklet included.Sizes in order of large to small: Orchid: 5.5" x 1.25", Blue: 4.6" x 1"Lavender: 3.9" x .875", Coral: 3.3" x .75"Yellow: 2.8" x .5"