New Wax Slab Bar Adding sparkle and scent to your home £3.50 Out of stock. 'new' Wax Slab Bar Fragrance: We recommend snapping off between 2-3 squares dependant on the size of your melt burner. Weight of each bar is approx 80g. Measurements of each bar approx 16cm x 8cm. Each bar is wrapped in eco friendly biodegradable bags and our sparkle is also biodegradable.