I’m comfy with a 9” dildo but only after “getting warmed up” - foreplay and slowly increasing my limits.
Seeing a 12” flexible dildo fit into a woman’s vagina takes time, or as another couple added, extensive use. Just curious on your favorite and rewarding use and length of real cocks and dildos.
I have two dildos, both are about 7 inches. One is slightly thicker (I rarely use that one unless I'm craving feeling filled out). For reference both can go through a toilet paper roll. I noticed if a toy is thicker than the roll it will definitely not be going inside me (I've tried & was disappointed on the wasted money). Not sure if material has anything to do with it being able to go in, but my favorite toy also has the softest feel & is actually more expensive than other toys I've bought in past.
My wife's favorite toys were 7" and 9", but she says she never experienced a 9" penis in real life. She would have said a definite "no" if I had approached her with 12" of anything.