Working And Output Size
In large format printing, the working size is the actual output size.
Although there is difference between working and cutting size in digital printing, but working size included in large format printing is not a margin that can be cut off anytime.
This is due to the diverse usage of large format printing, and sometimes it is necessary to have a large cutting margin.
Hence, you should not select cutting size based on normal digital printing method, instead you should select the final cutting size for your item correctly, based on the actual output size you want.