My wife used to say that size didn't matter. She was very tight even having problems getting examined at her doctor appt. I tried a mid-sized black dildo which was 7 a year and a half ago. It was both thicker and longer than me. She became used to it quickly and had orgasms nightly from penetration (unlike with me). After a while I got a bigger blk dildo at 8in. She loved it and after a few months was able to take it all and orgasms got even more intense. Two months ago I got a huge big 9 1/2 in and thick black dildo (sean michaels). She now already takes it all and has multiple orgasms nightly. She even moans that she loves huge blk cock when cuming. I asked if size matters and she said it does.