Noun. 1. volcanic crater-a bowl-shaped geological formation at the top of a volcano. crater. caldera-a large crater caused by the violent explosion of a volcano that collapses into a depression. geological formation, formation - (geology) the geological features of the earth.
A standard single bed is 3 feet wide and 6 feet 3 inches long (91 x 190). This is the most common bed size for children, kids beds and bunk beds. What size is a Small Double bed? 122 x 190 cm / 48 x 75 / 4' x 6'3. A small double bed refers to a 4 feet wide, 6 feet 3 inches long mattress (122 x 190 cm).
W 77cm x L 192cm (2'6'' x 6'4'') The small single will fit narrower kids' bed frames and guest beds. It's the perfect size if you're trying to save on space and is great for a spare room as it can be easily moved when you have guests.