Warning.
If, like us, you are buying a retractable gazebo to go across your bi fold doors, please be careful
The 3m (or 4 m. We bought two, 1 each for the kitchen and the lounge) measurement is from the very outside edge of the frame.
So you need to take into account the distance between the width pole (that the fabric is attached to) and the upright structure and also the width of the upright structure. Then you have your clearance distance for your bifold doors.
Likewise the height measurements.
So a 3m gazebo in this case is not really a 3m gazebo at all.
If you are thinking of replying to say "Well of course it's not. Things like this always show the measurements between the furthest outside edges" then please, save your typing fingers.
it won't be helpful to me at all and I'm likely to send you a virtual slap.