The Billie Razor Refill Blades are a pack of 1 containing 4 cartridges with 5 blades each. Designed specifically for women, these refill cartridges are used for shaving legs and underarms. The razor blade width is 3/8 inches, ensuring a smooth and comfortable shave. With the trusted Billie brand and quality craftsmanship, these refill blades are a must-have for maintaining your skincare routine.