our candle warning sticker decals are covered with a plastic protective film, which are waterproof and oil proof.The diameter of candle jar label is 1.5in / 38mm,these candle safety labels are featured with black and red text, which can highlight the warning text in red and bold, which makes people notice these wax safety labels.these candle jar container tickers are self adhesive,no other glue or tapes are required, Just peel off them and stick to the candle containers.