In addition to the model planes I'm making I made a model soyuz spacecraft. I was astonished by how small it is. Here's an image comparison with the Apollo spacecraft and an F-22 fighter jet:
The F-22 is designed to carry one man for a few hours, a day tops in Gulf War situations with multiple sorties.
Soyuz is designed to carry three men for up to 30 days, or 200+ days when docked with the International Space Station.
Apollo held three men for just eight days and brought them to the Moon and back.
Imagine being stuck in a compact car for an entire month and not being to step outside even for a minute without putting on a wetsuit. During that entire time you have to crap in a bucket in front of two other guys.