"It's too big folded" is the single biggest worry about the G-Line. So measure it, properly.
Pick a Brompton and a space, and see to scale whether the folded bike fits a car boot, a train
rack, a cabin bag, a station locker or under your desk. Every space here is a real, sourced
dimension, not a guess.
To-scale, allowing the bike to be turned or laid down. Real fit depends on shape, not just the box — wheels and bars stick out. Every space dimension is sourced or clearly marked as typical.