Quick answer

Choose the Small Oros if you prefer a gentler fit, the Medium Oros for a balanced middle ground, and the Large Oros if you're experienced with wider toys and want maximum fullness.

Why size matters more than length

When comparing the Oros sizes, the widest shaft diameter is the number that determines how stretchy the fit feels. Length matters less because the usable length is similar across sizes; the real difference is in girth and how full you feel.

All three Oros sizes come in soft silicone (0030), which means they have a gentle, squishy feel. Soft silicone can make a wider toy more approachable, but it also means the toy bends and flexes, so you need to account for that when inserting.

Trade-offs of soft silicone

Soft silicone is great for comfort and for people who are sensitive to firm pressure. However, it can be harder to insert if you're not used to a squishy toy, because it doesn't hold its shape as firmly. You may need to use more effort or a different angle.

If you're between sizes, the softness can help you size up more comfortably than with a firmer toy. But if you prefer a toy that holds its shape and offers more resistance, a firmer silicone might be a better choice—though it's not available in the Oros line.

How to choose your Oros size

  • Start with the widest shaft diameter: Measure your current comfort limit or use a set of graduated toys. If you're new to toys, start with a diameter of 1.7 inches or less. If you're experienced, you can aim for 2.2 inches or more. Your comfort with girth is the main deciding factor.
  • Account for soft silicone: Because the Oros is soft, it will compress and bend. This can make a larger size feel more forgiving, but it also means you might need to guide it more during insertion. If you're between sizes, you can size up, but be ready for a learning curve. Soft silicone can let you try a slightly larger size than you'd normally pick.
  • Match size to experience level: Beginners or those who prefer a gentle stretch: choose Small. Intermediate users who want more fullness: choose Medium. Advanced users who want maximum girth and length: choose Large. Use your experience level as a starting point, then adjust based on your comfort with girth.

Oros sizes at a glance

  • Small Oros -- Soft silicone -- OF-O-211: Small Oros has a total length of 5 inches, a usable length of 4.25 inches, a head diameter of 1.3 inches, and a widest shaft diameter of 1.7 inches. This is the most approachable size for beginners or anyone who prefers a slimmer, less intense stretch.

    Small Oros -- Soft silicone -- OF-O-211

    Small Oros -- Soft silicone -- OF-O-211

  • Medium Oros -- Soft silicone -- OF-O-257: Medium Oros has a total length of 6.5 inches, a usable length of 5.25 inches, a head diameter of 1.7 inches, and a widest shaft diameter of 2.2 inches. This size offers a noticeable step up in girth while still being manageable for most users with some experience.

    Medium Oros -- Soft silicone -- OF-O-257

    Medium Oros -- Soft silicone -- OF-O-257

  • Large Oros -- Soft silicone -- OF-O-261: Large Oros has a total length of 7.5 inches, a usable length of 6 inches, a head diameter of 1.8 inches, and a widest shaft diameter of 2.4 inches. This is the fullest size, best for experienced users who want a wider stretch and longer usable length.

Who each size is best for

Best for

  • Beginners or those who prefer a slimmer, less intense stretch
  • Users who want a travel-friendly or easier-to-handle toy

Not for

  • Experienced users who want a wider, fuller sensation should choose Medium or Large