Truly Magnificent Costume hence the name 
Gorgeous lace,Design, The Lycra , the double tulle.  the sequins , the stretch is very good ! 
 
This will look incredible on stage 
Attached BIKETARD as per dance 
EXPLOSIVE !!!
Fyi measured on Weissman size chart 
My go to !
It would fit a medium child MC on the bigger end, but more like large child.LC