Ladbrooke Soil Blockers - 3/4" Mini Blocker (20 Blocks)Makes twenty 3 4" soil blocks per stroke, in an area 3" x 4". Use this size when large numbers are needed, when space is limited or when fast germination is desired, as the blocks warm rapidly because of their small mass. Move up these mini blocks into a larger 2" soil block when affixed with the cubic creates just the right size for the mini block to drop into). Made from zinc coated, solid steel Overall size is 3 7 8" W x 3 5 8" L x 3 1 2" H,