The biodegradable sky lanterns are made of 17g flame-retardant stencil paper, non-toxic wax and bamboo. This paper material is premium and high quality and is not as thin and easily torn as other mateial made sky lantern, its highly flame-retardant nature makes them not easily be burnt after they are lit up and flown into the sky. It is equipped with a separate wax block, which is made of paraffin and asbestos, easy to ignite. It is perfect for birthday party, wishes, wedding and any other celebratory events. You can write down your sincere and best wishes or blessings for your family, lover or friends on the paper. 37 51/64" H x 21 21/32" L x 12 19/32" W