Dimensions vary by model. Heights listed include about 10 in, 10.51 in, and 11.5 in; listed widths range roughly from 1.68 in to 7.99 in. Many listings also give a maximum head size of 26 in. Check the specific product listing for the exact height/width/depth for that model.
The masks are listed as made from generic plastic and some specifically list ABS (Acrylonitrile Butadiene Styrene). Refer to the product page for the exact material used for a given model.
Some masks include light effects and require a single AA battery (a demo battery is noted as included in those listings). Other mask options list no battery use. Check the product description to confirm whether batteries are required and whether a demo battery is included.
Masks fasten with elastic or adjustable straps. Many listings note adjustable straps that fit most head sizes and commonly state a maximum head size of 26 in. Review the product page for the specific strap type and sizing guidance.
Flip masks offer two looks (flip-up or closed face), movie-inspired styling, and light-up effects activated by flipping the face. They also include an adjustable strap. Reviewers frequently mention the flip and light features as fun for play.