355.71m (stated by the book, based on the Miranda Class parts)
Print orientation for Detail Plastic:
This is based on the Dakota Class Heavy Shuttle Carrier as featured in the book "Jackill's Star Fleet Reference Manual - Ships of the fleet volume II" by Eric Kristiansen. A fan-produced paperback technical manual, first published in the early 90's. So this is a completely non canon fan design.
If you need this in another material, size, or quantity, send me a message. I will try to make it as you need. Be sure to read my comments below my shop page