As you may know there are different standard bed sizes around the world. Are human heights that different country to country? There's tall and short people everywhere but go figure.
Anyway I cover US / Canada and UK bed sizes here. If you have a bed from Ikea (even if you bought it in one of the places covered here) it may be slightly different that either of these but the clearance information will still be relevant.
How big is the bed? How much space around the bed - side of the bed and end of the bed?
These bed dimensions are based on mattress size. If you have a bed frame that sticks out from under the mattress then you'll need to add to these total dimensions depending on the size of your bed frame.