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).
A twin-size bed is designed for one person. The main size difference between a twin bed and a full bed, also known as a double bed, is the width. A full bed offers more space from side to side, but certain twin beds are longer for taller users. A regular twin-size bed is 39 inches wide and 75 inches long, and is made to accommodate one adult or child.