Our sleeping bags are designed for maximum heat within the stated temperature range. New sleeping bags can therefore feel a bit tight compared to a duvet that we are used to sleeping in. If you’re willing to sacrifice a bit of warmth for comfort, there’s no harm in going up a size , and conversely, if you're willing to sacrifice a little comfort for warmth, you can go for a smaller sleeping bag . If you're of a rather broad build , we also recommend going a size up , or choosing a lady's sleeping bag, as these are slightly roomier around the upper body. Follow our size recommendations (height/width): Female; 173 cm; beginner: Rago Lady (175 cm) Female; 178 cm; experienced: Rago Lady (175 cm) Male; 182 cm; beginner: Rago (185 cm) Male; 188 cm; beginner: Rago Long (200 cm) Male; 190 cm; expert: Rago (185 cm)