How about [Buy 4 Free 1]?
When the quantity you buy is greater than or equal to 4, the system will automatically give you a 25% discount, so the more you buy, the more discount you get

Product name: Pure color double-sided background paper
Material: thick coated paper, covered with PVC film
Background paper size: 57*87cm (manual measurement, there may be a deviation of 1~2cm)
Package size: 59*8*8cm
Package weight: 0.26kg
Net weight: 0.13kg
Color: 37 colors, 2 different colors on both sides of each background, see the option diagram for details

Features
①Different colors on both sides
②Double-sided covered with PVC film, waterproof, dustproof and wrinkle-proof
③Material is thick coated paper
④Due to long-distance transportation, if the product you receive is damaged or otherwise, please contact us in time to give us a chance to remedy it in time, and we will give you a satisfactory solution

Upgraded packaging, multi-layer protection