Maybe oak leaves?
This is a ‘miyako yuzen katagami’ . These stencils date from the mid- 20th century and were sold in sets , sometimes with a frame, for use at home or possibly by small home-based textile businesses. Like all katagami they’re made from Japanese paper treated with persimmon tannin to prevent rotting. The designs are relatively simple and apparently were often cut by young, less-experienced craftsmen who would cut around ten sheets at a time. They measure 26.5cm x 45cm. They’re in excellent, sturdy condition and are suitable for use as stencils or for framing, covering lamps etc.