Isabella Silicone Urethral Sound Trainer

The Isabella Silicone Urethral Sound Trainer is a set of three flexible black silicone rods from the Mistress by Isabella Sinclaire collection at XR Brands. Each urethral sound is double-ended with a different width at each end, giving six graduated sizes in one box. It's aimed at people curious about sounding who would rather start with something soft and bendable than with rigid steel, and at experienced users who want a gentler stretch.

Silicone versus metal sounds

Steel sounds are rigid, heavy for their size and very slick. Silicone is the opposite on each count: it flexes to follow the body's curves, weighs little, and has a slight surface drag that needs more lube to glide. Some people find the flexibility reassuring, while others prefer the predictable feel of metal. Isabella Sinclaire, a long-standing professional dominatrix who chose the pieces in her signature line, describes these as softer and gentler than metal and suited to both beginners and seasoned players.

The six sizes

All three rods are 8 inches long. The small rod measures 0.19 inches at one end and 0.23 inches at the other (about 4.8 and 5.8 mm). The medium is 0.27 and 0.32 inches (about 6.9 and 8.1 mm). The large is 0.34 and 0.38 inches (about 8.6 and 9.7 mm). Begin with the narrowest end and stay there until it feels easy. Moving up a size is optional, never a target; plenty of people stay on the smallest rod.

Before you try sounding

Urethral play carries real risks, including irritation, small tears and introducing bacteria into the urinary tract. The supplier doesn't include step-by-step instructions, depth guidance or a sterilizing method, so we won't make them up. In general terms: wash your hands and the area, clean the sound thoroughly, use generous amounts of sterile water-based lubricant, go slowly and never push against resistance. Keep hold of the end at all times. Stop if you feel sharp pain, burning or see any blood. If you have a urinary condition or any doubts, speak to a doctor first.

Who this set suits, and who it doesn't

It suits someone who has researched sounding, understands the hygiene involved and wants a flexible, graduated set to explore at their own pace, alone or with a dominant partner guiding the session. It isn't a casual first sex toy, and it isn't for anyone who wants a device to leave in place; these are hand-held rods with no stopper or ring at the end. If you only want sensation around the head of the penis, a vibrating or textured toy outside the body is a far simpler place to start.

Cleaning and storage

The supplier describes the silicone as non-porous and phthalate-free, and says the sounds are easy to sterilize, without giving a method. At minimum, wash each rod with warm water and mild soap before and after use, rinse well and let it air-dry on a clean towel. Check the packaging for any heat or boiling guidance before trying it. Store the set in a clean, sealed bag away from other toys, since silicone attracts lint.

Specifications

• Collection: Mistress by Isabella Sinclaire (XR Brands)
• Material: silicone, phthalate-free and non-porous per supplier
• Pieces: 3 double-ended sounds
• Length: 8 in each
• Widths: 0.19/0.23 in, 0.27/0.32 in, 0.34/0.38 in
• Flexibility: bendable
• Colour: black

Our guide to cleaning and storing adult toys covers silicone care. Browse the wider BDSM range, or see the Isabella Sinclaire leather wrist cuffs from the same line.