I need to order some poly pellets to weight some amigurumi figures I'm making. Each figure needs a pad of beads in the base. The figures are about 6cm across the base and will be 20cm tall and I'm making 8 figures. I can buy the pellets in 250g, 500g and 1kg packs. Will 250g be enough? I don't want to have a load left over as that will just encourage me to start a new project 