Hysterically funny gag gifts and practical jokes for adults and kids. These googly eye glasses blink when the wearer smiles and stops. It is a novelty funny joke toy gift. One size fits most. The blinking eyeball glasses are 18 x 7 cm. With the 2 adjustable straps, they fit the size for adults and kids of all ages. How to adjust the 2 straps. Step 1: There are 3 adjustable holes on the temples of the glasses. Choose a hole based on your face shape, thread the white strap through it, and then tie the white straps tightly under the chin; Step 2: Thread the black rope through the hole at the end of the temples of the glasses. Pay attention to correct tying, as shown in the figure. Step 3: Make sure the two straps are tied tightly, laugh and smile, and the new funny glasses will blink. For all kinds of festivals and carnivals. Perfect dress up for costume parties, role-playing parties, beach parties, hen parties, stag parties, Halloween, Christmas, birthday parties, meetings, classes, graduation ceremonies, bachelor parties, graduation parties, wedding photos, photo booth props whether indoor or outdoor. Perfect party supplies. Great unisex gift. These colorful glasses are great gifts for families, kids, couples, relatives, cousins, friends, classmates, colleagues, roommates. Have fun together.