Normally the loft of a 7 iron.
7 iron
PW - lie 64°, loft 45° 9 - lie 63.75°, loft 40° 8 - lie 63°, loft 36° 7 - lie 62.25°, loft 32° 6 - lie 61.5°, loft 29° 5 - lie 60.75°, loft 26° 4 - lie 60°, loft 23° 3 - lie 59.25°, loft 20°
The number relates to the loft of the club and the length of the shaft. For example a 3 iron has the lowest loft and longest shaft. A 7 irons has more loft and a shorter shaft than the 3 iron.
9 Iron has the most loft and least distance. 3 iron has the least loft and most distance.
The loft is 60 degrees. The original ping Eye SW was 57*, the LW 61* The Ping Eye 2 + (plus) SW is 53*, SW 58*
protractor
Ping moxie is a junior set of clubs for a 8-12 year olds consisting of sand iron, 9 iron, 7 iron, 5 iron, fairway wood , driver, putter and stand bag
A number 1 iron typically has a loft of around 16-18 degrees.
The loft of a Tommy Armour S-20 sand iron is typically around 56 degrees.
7.4 degrees
There is no rule saying how high or low the loft of any club can be. Someone at my golf school has an 11 degree driver since he cannot hit the ball very high.