HGW0.5mm thick means it's printed on high-grade sticker paper and adhered to 0.5mm thick cardboard, with a wider width of 201mm (originally 179mm). ☆☆Background Material Production History☆☆ ① Initially, printed on high-grade paper and adhered to 1mm thick styrene board. 300 yen per sheet. ② The price of styrene board increased, so 400 yen per sheet. ③ Reduced the price to 180 yen per sheet by adhering to 0.5mm thick cardboard... However, the printed paper would lift and peel off over time. Had to print on regular sticker paper, and the image quality decreased because high-grade paper couldn't be used. ☆ Printer malfunctions repeatedly after a year with compatible ink. ④ Had to use genuine ink, and the price became 250 yen per sheet. ⑤ Found affordable high-grade sticker paper, used it, 320 yen per sheet. ☆ This time, the price of high-grade sticker paper increased by 1000 yen per 100 sheets!! Tough!! Even if I buy 100 sheets, due to printer issues, only about 70 sheets are usable at best!! ⑥ 340 yen per sheet Shipping costs are separate in all cases.