30g of borax. I will repack it into a bag with a zipper and ship it. Since 4g of borax is needed for 100ml of laundry starch, it's the perfect amount to use up with 750ml of laundry starch (*^^*) The box says 100ml of laundry starch, 100ml of water, and 50ml of borax solution, but about half that amount is easier for children to make ★ It's easier for children to make if you write the measurements in advance with a marker, as shown in the third image (*^^*) Shipping is not available on weekends and holidays. - Product Name: Borax - Purpose: Slime making - Contents: 30g