Well the suit partially depends on the size of your character. if your character is 5 foot tall they're exo suit would be about 7-7 and a half feet tall. The cockpit is in the chest and their limbs go into the exo suit's limbs. This is very far into the future, but don't think gundum or gurren lagann. The suits excluding the marines weren't made with combat focus anyway (they do have weapons because its a hostile alien planet, but they aren't tanks with cannons like the marines). I'll use the example of my character's suit so heres a snipit:

Canustrike. A custom EXO that Izic built. He refused to let anyone else do the job. It’s visually simple EXO. It has the basics of an exo-suit in that it cover Izic completely in a good four inches of suit. It is designed to have excellent movement capabilities, so the armor is still very light. It has a black, dark grey, and dark green paint job like old military camo, but he just used the colors overall not camo. The suit is about eight foot tall since Izic prefers the additional size when he‘s doing big jobs. The head/helmet is modeled after a wolf’s head, and the optical ports seem to have a very menacing glare to them. The feet and hands are both clawed. Two hooked longs swords come out of the top of the forearms. Izic put theses in to highlight the agility of the suit, and make it a great melee unit. Even as an engineer Izic wanted a very strong combat EXO. If anything he wanted it so he could survive to help the others. He also put in two heavy fire shotguns which attach to his back. These spray after impact and cause more damage to the inside of the target.

But there is a flip side to this EXO. Izic knew he’d have to still work in it so the claws on the hand retract, or can be used as misc. tools while working. The dexterity and percision of the EXO also lets Izic work as well in it as out of it.