We offer the standard sizes in industry of the Spek M anchor, which go for smaller vessels such as ferries from 80 to 2280 kgs. For larger sizes of boats, such as cruises, it is commonly used from 2460 to 9900 kgs. And for the largest ships that use the Spek M anchor we have sizes from 10500 to 20000 kgs, such as cargo ships or aircraft carriers. If you want to see more details about sizes and measurements, we have documentation from the Spek M anchors that we have in Stock.