Bought for a QJ FORT 125N scooter, on which it fit like a glove... it has an excellent fit, it is a soft product and not a tarpaulin, it is easy to work with and stretches like a sock, hugging the bike... due to the particularity of the mirrors (they stick out a lot), it needs a good fitting there and then it sits perfectly... the fastening strap at the bottom is not enough on my scooter and I sewed on a second one near the fairing and the front fender and now it seals and does not allow the little animals from my yard to nest inside... I MAY have needed the L size, although the dimensions of the M are correct, I just don't know if the L would make it ''baggy'' and wouldn't fit so nicely... I will come back after the waterproofing test