Marble Design Pop-ups Toys -Size 1.75 - 12 Pack by pops 12 pack of marble design poppers. Most popper are 1 inch.. these are 1.75 almost 2 inch. Just invert the popper hold it in place, put it down and step back...and wait for it to POP !!!! great for age 5 to 18..excellant for large age range these are very fun.