Most standalone toy skateboards in these listings measure about 8 x 2.5 x 1 inches (one listing shows 8 x 2.5 x 1 in; another lists 0.98 x 2.52 x 7.99 in), so expect roughly an 8-inch length and narrow deck suitable for small dolls or pets.
Accessories typically clip on or are made to be compatible with dolls and small plush pets, letting a doll or pet sit or be secured on a skateboard, scooter, or clip-on seat designed for play.
Typical sets include a small skateboard plus protective gear (a helmet is common), stickers and knee pads, and role-play extras such as water bottles, parking blocks, collars, medals, and clip-on seats for toy pets.
Most sets include a helmet (sometimes noted with a strap); some also include knee pads and sticker sheets for personalization or matching gear.