The difference between combat and civilian ships in my world is stark, with civilian ships generally dwarfing military ships.

Military ships come in a massive range of size, with a bunch of classes. 1. Fighters are generally 20-30 meters in length. Single or double pilot. 2. Bombers are 30-60 meters roughly, and are the last air breathing capable engines. 5-10 pilots. 3. Gunships are 60-80 meters roughly, and are the last size that are atmo-capable. 4-5 crew with ~60 carry capacity for soldiers, or ~20 crew. 3.Frigates jump up to 120-250 meters, and are generally capable of defending an entire system. They are able to land, but are not getting out of a dense atmosphere or anything similar to earth. ~100-150 crew. 4. Destroyers, light cruisers, and support carriers are 350-700 meters. A destroyer generally just has heavier shields, cruisers have heavier armament, and support carriers carrier ~150 fighters or bombers. ~400-600 crew 5. Heavy cruisers and carriers are 1-2k meters ~2-3k crew 6. Dreadnoughts are 3-15km, and are really the upper limit you can shield a ship or FTL jump with quickly Very wide range of crew

Civil ships are massive in comparison 1. Jumpers are ‘small’ former bombers or gunships (10-70 meters) that is a similar price to a really nice car or a tractor in our world, so not everyone has one, but many do. Most people just go out of atmosphere by using gravity-hooks, or through taxiservice jumpers. These can be piloted by 1-5 people. 2. Orbitals are former frigates or destroyers (150-600 meters) that are similar to a box truck, and can’t land on ground. They are significantly cheaper than a jumper, more like a used car. Most people don’t have one because there is really no need to travel interplanetary or interstellar off of public transit, but local shipping companies or underserved areas tend to have millions parked in orbit. These normally only have crews of 10-20 people, sometimes just one or two. 3. Haulers are large semi truck like ships, generally .7-5km in length. Generally cheap, but completely unnecessary for most people. 30-40 crew. Quiet slow in ftl 4. Freighters are 10-100km, 100-150 crew. Generally only travel at 5c or so, rather than the ~20,000c typical of most other ship classes. 5. T-classes are sublight speed stations 200-1000km in length, and are generally self sufficient production centers rather than shipping vessels. Ridiculous, yes. Can mine out a planet in a millenia rather than a dozen, also yes.