Most 50s-themed decorations are made from paper or heavy cardstock. Some hanging pieces use plastic, and specialty whirls or accents may be foil.
Sizes vary by item: garlands and banners can be very long (examples list overall lengths around 180 inches), while tabletop pieces like mini centerpieces are often small—about 5 inches tall.
Cupcake wrappers are designed to wrap around finished cupcakes and are adjustable. Listings give ranges such as 1.75"–2.5" wide or adjustable up to about 2" in diameter—check the product listing for the exact fit.
Many pieces are professionally printed—often double-sided—on heavy-duty cardstock. Some items also have a photo-like shine for a more polished appearance.
They typically come with pre-punched holes and cord (for example, long satin cording) so you string the pieces and adjust spacing. Garlands can also be cut into shorter sections for windows, tables, or photo backdrops.
Centerpiece kits typically include multiple printed toppers plus sticks and assembly stickers. You attach the toppers to the included sticks and place them in vases, floral arrangements, jars, or use them as photo props on tables.