This optical illusion prop has the effect of floating 2" above your hand & is sure to add an awesome flair to your next costume/cosplay. The LEDs make for an extra awesome effect at night to highlight aspects of your costume. Made from strong and durable cloth. Power supply by 3 button batteries (not included). Size: 3.9"x3.9"x5.9" This Halloween Floating Fireball Prop Made from pre-color treated specialized polycarbonate sheets, clear PETG plastic base & removable on/off LED string lights. These new floating fireball prop 2.0's are stronger, brighter and look even better with lights off thanks to the new duatone process in their fabrication. The size of the hand strap is about 8 inches, which fits most palms and may even be loose. The edges of the fireball are all round, which will not be compatible with sharp and will not harm you. If you have any questions after purchase, please feel free to contact us, we will give you the most satisfactory service.