If you're just beginning to explore the potential pleasures of butt play, start with the smallest of three included smooth silicone plugs. Move up to the medium and large plugs from there, or stick with the little one, it's completely your call!
Classic in shape, the sleeker tip of each Trainer swells gradually outward to a largest point near the bottom. A nice long neck helps hold the plug in place as the softly pointed base circular base fits comfortably between your or your partner's cheeks. That base also helps protect against any too-deep slips- a definite plus when it comes to anal penetration.
In hypoallergenic silicone, each Colours Pleasures Trainer Kit plug is extremely hygienic, cleaning easily using warm soapy water or a good toy care fluid/foam- it can also be boiled or bleached for more thorough sterilization. Always enjoy a great quality water based lubricant with this plug, silicone formulas should be avoided, as should contact with other silicone and soft toy materials.
* Measurements below represent the largest plug. The Small is 3" (7.6cm) insertable and .9" (2.3cm) at widest, the Medium is 3.5" (8.9cm) insertable and 1.1" (2.8cm) at widest.