So you think anything below 7-7.5" girth could fit in... Hydromaxm. I think I recall hearing someone at about 6.25" saying girls have trouble trying to or can't, and I've been thinking maybe 6" girth may be too much for oral. But I wouldn't have a way of knowing...
Are you only doing a girth routine? I think maybe two others... Red and Alloy may have claimed to gain length with only girth work... But I don't want to become disabled from receiving oral, tha would suck. :s