These bars are formulted and cured 4 weeks so they last if not left sitting in water. They weigh aproximatly 4-6 ounces. Because they are handmade no two batches look the same, try as I may. And because I use no preservitives these products have a shelf life which varies. No animal bi-products are used so they are vegan friendly. Soothes exzema and phorisios. This is a personal blend, of lavender, amber, sandalwood, patchouli, oak moss and bergamont.