Wasn't sure about the 4.9 cm size at first but the graduated sections make it surprisingly easy to work up to. The hollow interior is a nice touch too, adds a whole different feel compared to solid ones I've tried.
Grace A.★★★★★
The progressive ring sections make the insertion way smoother than I expected for something this size. The hollow tunnel structure is exactly what I was looking for, and cleanup afterward was easier than with my old solid one.
Emily N.★★★★★
Wasn't sure about the hollow design at first, but it actually makes a big difference for a more gradual experience. The multiple rings feel smooth going in and the whole thing cleans up way easier than my old solid one.