Disguise Disney Junior Sofia the First Next Chapter Classic Girls' Costume Purple/Toddler, M (3T-4T)

Is this a heavy or thin fabric? Doing 2nd bday party in June and want a dress for her to wear outside.

What to get 4 year old she is 42 inches and 41 lbs

Is is this covered in glitter? We have another princess dress that is designed with glitter and when she wears it, it's all over her and the house!

What size is L(4-6x) mean in kids!