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).
Our bed is two singles to make a double, as is normal here-each bed is 90cm wide and 220cm long. The main problem in France is often not the width of the bed but the length of it. They tend to be rather short. I would check with the hotel if size is really important to you.