ROCK ISLAND SPONGE COMPANY offers fast turnaround times on shipping, and most orders are shipped out within 24 to 48 hours. Larger and wholesale orders can take additional time, based upon volume, and item types. Natural sponges are subject to harvesting and seasonal variations in supply, so some larger and rare sizes can take longer to ship. Ten inch sponges and larger typically fall into this category and can be subject to minor delays as they are subject to availability. We typically ship all packages via US MAIL.