How Do You Boo? Add the perfect finishing touch to your Monster High party decorations with this Monster High Ultrashape Diamondz Foil Balloon. This balloon features a different design on each side. Combine with our range of Monster High party supplies including party cups, lolly bags, tablecovers, party favours and more. Party time! Item Includes: Balloon. Fit and Sizing: Balloon measures 38cm/15in wide by 43cm/17in high. Please note: Ribbon not included. This self sealing balloon requires helium inflation.