EXCHICWomen's Fashion Solid Elastic Waist Mini Skirt Pleated A-Line Suspender Brace Skirt

Is this machine washable?

I’m a uk size 8/10 and 5’10. I love this dress but people here are saying it comes up short on 11yr olds! Should I even bother ordering one?

Do they do it in a longer length as its way too short

How about if your a size 8, would I got for medium