User blog comment:Boy-Yo/Funimation voices for the last two Yonko?/@comment-28573618-20170312024552/@comment-28573618-20170312054019

The oldest One Piece character we know is Kureha at 141. I doubt Big Mom is anywhere close to that. By my guess, looking at other older characters like Whitebeard, Sengoku, Garp and Tsuru (all in their 70's), she doesn't look that old. I'd wager Big Mom's in her 50's like Sakazuki, Borsalino, etc. Or probably in between in her 60's, I don't know...