A crab with a width of less than 5 inches is regarded as medium size, and sells for NT $ 160, while a small crab of less than 4.4 inches brings NT $ 110.
四台寸以下的稱中蟳，產地價約為一百六十元。三寸七以下的小蟳，產地價約一百一十元，可是海產店都賣二百五十元左右。