Grow with the Jiffy 7 advantage today! These 42mm Jiffy peat pellets are shipping compressed to save on storage space.. When soaked in water, these Jiffy pellets expand to significantly to 1.75" dia x 1.75" tall when fully expanded, creating an all-in-one seed starting system. Jiffy 7 peat pellets are rapidly becoming the #1 choice of gardeners everywhere. Available in multiple sizes to suit any seed starting and plant propagation needs. Jiffy pellets are the all natural approach to plant propagation. They come pre-formed and ready for planting, simply expand with water. Jiffy peat pellets are the ideal choice for indoors seed starting. The soft walled pellets allow plant roots to naturally air prune as they emerge through the pellet. Jiffy 7 peat pellets are a consistent seed starting medium that is optimized for propagation and root development. Dimensions: 1.75"x 1.75" (Diameter x Height)