The letterhead is made of clear material(PVC), & the envelopes are made of tracing paper, creating a transparent letter set. The address stickers are pre-attached with the envelopes. Please make sure that the ink is dry before enclosing the letterhead into the envelope. If you write with a dark colored pen, it may show through the envelope. ▶︎details -Letter Paper size : W135×H88mm -Envelope size : W142×H92mm -6 sheets letter paper -3 envelopes -material of letterhead : PVC -made in Japan Transparent Letter Set - Kohaku “Polar”
