Most of the time when they say Double it is a Queen size.
The standard widths of typical Italian beds are:
- Single bed (Twin bed in North America): 80 cm wide X 190 (or sometimes extra long at 200 cm long)
- Standard Matrimoniale or Double bed (like Queen in North America): 160 cm wide x 190 cm long
- King Double bed: 170 cm wide x 190 cm long
The most likely double bed in hotels (matrimoniale) is the standard double at 160cm wide, that is 63 in. (so 3 inches wider than the North American Queen, which is 60in). Since the single bed is exactly half width, Sometimes hotels put two single beds next to each other then call it double bed. It is actually a bit larger than a Queen size.
So do not worry, because sometimes ... less is more!