I'm assuming by EMSG...you mean Erect Midshaft Girth?? Thats just an acronym I hadnt seen yet. If I'm correct. Regular condoms should work great unless you've got 7"+ of length . The magnums and Magnum XLs will probably be loose and not stay on unless youre over 5.5" on girth...not post workout cuz we all know thats temporary right after a workout. Hell even if you do have 7"+ of length but, less than 5.5" on girth stick with the regulars...you dont want a condom slipping off! I'd rather it be too short than too loose for ya. Then again, they do sell them in 3 packs so why not go ahead and buy some just for giggles to see if they fit...if theyre too loose..hey, youve got some work to do right?