I measured the insertable width at 3.9cm around the middle, 4.2cm at the base with vernier calipers. I think the official site states it at 4.4cm, maybe the curved head makes it feel a bit larger or we use different measuring methods
Draggy silicone, strong suction base. Not very firm (ie, you can squeeze it in your fist with some give). Superfluous veins. Great purchase