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A strap-on is a dildo worn in a harness, so the wearer can use it hands-free on a partner. People of every gender and pairing use them: lesbian and queer couples, straight couples trying pegging, and anyone who wants to experience penetration from the other side. You can buy the harness and dildo together as a kit, or separately so you can match a harness to toys you already own.
A kit takes the guesswork out of fit, because the dildo is already sized to the harness ring. Good starting points include the b-Vibe Beginner Strap-On Set with a 5-inch silicone dildo, the Sportsheets New Comers Kit and the Blush SX For You Kit. For a first time, a slimmer, smooth dildo in the 5 to 6 inch range is easier for the receiver than something long or heavily textured.
Pegging kits pair a harness with a slimmer, curved dildo that's easier to take anally. The ROMP Piccolo Pegging Kit is a gentle place to start, the Sportsheets Saffron Pegging Kit comes with an adjustable harness, and the b-Vibe Vibrating Curved Strap-On Kit adds vibration. Use a thick anal lube, go slowly, and let the receiving partner set the pace.
A strapless strap-on has a short bulb that the wearer holds internally, so there's no harness at all and the wearer feels movement too. The Strap-On-Me Vibrating Bendable Strap-On comes in several sizes, and the XR Mighty Rider and Temptasia Luna are other options. They take some practice to keep in place, so many people start with a harness. See all strapless strap-ons.
Harness styles differ mainly in how they spread pressure. Jock and brief styles, like the Get Lucky boxer harness, spread it across the hips and stay comfortable for longer. Two-strap designs adjust more precisely but concentrate pressure where the straps sit. Thigh harnesses like the Sportsheets Thigh Strap On put the dildo somewhere other than the pelvis, and lingerie harnesses from Strap-On-Me and Sportsheets look like underwear first.
Two measurements decide whether a harness works: the waist or hip range, and the O-ring diameter. A ring that's too small won't seat the dildo; too large and it won't hold. Many harnesses include interchangeable rings for exactly this reason. Our strap-on harness guide explains how to measure for both.
Any dildo with a flared base can go in an O-ring harness; browse harness-compatible dildos or double-ended dildos if both partners want to feel it. Pair silicone dildos with water-based lube, wash the dildo after every use, and hand-wash fabric harnesses so the straps keep their stretch. Harnesses on their own are in our harness collection, and Strap-On-Me has its own page.
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Helpful answers about Strap-Ons & Strap-On Kits Canada.
A kit is the simpler first purchase because the harness and dildo are already matched for fit. Buying separately costs a little more attention but lets you replace either piece independently, and lets you pair a harness with toys you already own. If you go separate, check the harness O-ring diameter against the dildo base before ordering — see Harness-Compatible Dildos for toys made for this.
The O-ring has to match the diameter of the dildo where it sits in the harness, not the widest point of the toy. A ring that is too small will not seat the base; one that is too large lets the dildo shift during use. Many harnesses ship with two or three interchangeable rings for exactly this reason, which is worth looking for if you expect to use more than one dildo.
A jock or brief style sits like underwear and spreads pressure across the hips, which most people find more comfortable through longer sessions. A two-strap harness adjusts more precisely and suits a wider range of body shapes, but concentrates pressure where the straps sit. Neither is better as such — it depends on fit and how long you expect to wear it.
With a conventional harness the wearer mostly feels pressure from the harness itself rather than from the dildo. If shared sensation matters, look at Strapless Strap-Ons, which are held internally by the wearer, or at harnesses with a pocket for a bullet vibrator against the wearer.
Check the stated waist or hip range on the individual product rather than assuming one size fits. Ranges vary widely between brands and between styles — adjustable two-strap designs generally cover a broader range than fixed briefs, and several brands list plus sizes separately. If a product page does not show a range, ask before ordering.
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