crêpe paper 
noun [mass noun]
Thin, crinkled paper resembling crêpe, used especially for making decorations.We were given crêpe paper to make hats, lanterns and crackers and Mrs Archer would provide us with a sweet or a nut to put in the cracker....
- Drape the traditional black and orange crêpe paper from the ceilings and door frames and hang up some of those fake spiders and bats for added effect.
- There were pink balloons in the foyer and vases full of pink tulips on every available surface, and pink crêpe paper was spun from the beams and light fixtures.