Size of Medium Mini- Diameter is approx. 1.5 inches. (about the size of a ping pong ball)**Want smaller minis? We sell 1 inch minis in another listing in our shop. Visit us!Mini Bath Bombs Make great birthday favors, wedding shower favors, Baby showers favors and more! Each order includes one mini bath bomb. We also sell them in groups for less. We infuse a blend of essential oils and all natural flavor oils into each batch of bath bombs. Bath bombs make bath time fun for everyone Each Batch is made to order so that they are fresh and smell great! Colors may vary from batch to batch.