DOC Indoor Bike Cover - Size

Hi for the DOC Indoor bike cover xsmall/small size, will it fit a '91 900ss / 749, or would it need the next size up.
Other sizes Medium/Large, X Large/XXL
It needs to be red, and only small size in stock, appreciate any feedback if you have one of these
Cheers
Kim

I think you will need Medium because of the fairings, small will fit Monster