Four feet and four widths: about 107* 17cm. A pack of 5 pairs, the unit price is around 4 yuan.
Four legs and three openings: about 138*22cm. A pack of 5 pairs, the unit price is around 7 yuan.
Six feet three openings: about 180*32cm. A pack of 5 pairs, the unit price is around 25 yuan.
Eight feet three open: about 240*34cm. A pack of 5 pairs, the unit price is around 35 yuan.
Specifications, each family, there is little difference. Price, depending on the paper and brand, the price will be different, for reference only.