Method 1: Crafting Table
Place 3 matching stone in a Crafting Table to make 6 Red Sandstone Slabs.
6 How to Make a Red Sandstone Slab in Minecraft
Use this simple recipe to make a Red Sandstone Slab in Minecraft. You can see the exact ingredients, recipe layout, and workstation below.
Red Sandstone Slab recipe
Follow the recipe below. The pattern must use the correct slots when the recipe is shaped.
6 
Method 2: Stonecutter
Use 1 Red Sandstone in a Stonecutter to make 2 Red Sandstone Slabs.
2 About this Minecraft recipe
This page shows the vanilla recipe for Red Sandstone Slab. It includes the exact ingredients, recipe layout, required workstation, and amount produced.
The data comes from Minecraft Java 26.2. Recipes can change in later game versions, so check the version you play before crafting.