About 25. The sizes of sea cucumbers are different, and the degree of dryness is different, so the number of dry sea cucumber per catty will also be different. However, there are three kinds of sea cucumbers in the market: large-size sea cucumbers 10-20g, medium-size sea cucumbers 5- 10g and small-size sea cucumbers 3-5g. However, the price of a kilo in 600 yuan was found to be a large-scale dry sea cucumber,1kg500g.