Item# TBPRESS4X5 Press N’ Brew tea bags allow you to make your own professional looking tea bags using any herb or herb mix you choose. You fill the bag with herbs and then iron it shut. You can use any heat source with a minimum temperature of 200 F to seal the bags. The tea bags are naturally whitened with hydrogen peroxide, without the use of bleach or any other chemicals. The tea bags are dioxins free. The tea bag's interior measures 3.5x4.5 inches, the outside measures 4x5 inches.