The slab liner will hold approximately 130 ounces (8.125 pounds) of oils and will make approximately 12 pounds of soap. This liner is thick and the inside is polished for easy release of your soap. The polished liner also makes soaps look very smooth like glass! The soaps made in the slab liner can be cut to any width or length you prefer. You may also purchase our 15 bar slab divider set separately.