Guess what? All the
rules have changed. In years past (pre-1995), skis were sold by size
according to your height.
Nose high, head high, chin
high. It all had to do with your height and the trends varied a little
year to year.
Now, with the different constructions and materials, generally, skis are sized for you according primarily to your weight. Yep, that's right... your weight. Or at least that's what most manufacturers say. It gets confusing, though. You may ski a 158 Rossi Viper X PPS, but a 177 Rossi Bandit XX. And you'll find the Viper faster!
The best way to figure it out is to look at the available lengths in a particular model of skis and the height/weights standard adults come in and try to match up the two scales.
So if a ski comes in only two lengths (like a few of the twin tips), if you weight less than 160 lbs or are shorter than 5' 8", go for the shorter ski. If you're short, but on the heavy side, go longer. If you're average height but thin, go shorter. Aggressive "high energy" skiers should go a little longer than average.
If the ski comes in 150, 160, 170, 180, and 190, and you're a perfectly avergae guy, go for the 170. Another ski may come only in 140, 150, 160, and 168 (like some race slalom skis). Well, then if you're still that dead-center mid range height and weight guy, go for the 150 - a 160 if you're real good.
Oh, and if you've been happy skiing your straight 200's from 1990, don't let anyone talk you out of them. You can pick up some great bargains on unused "new old stock" skis on eBay.
The following are the general
recommendations from a couple of manufacturers for shape skis. These
are only general guidelines.
| Weight | Beginner | Intermediate | All-Mountain | Expert Carver | Adv.Freeride Exp. | GS Race | SL Race* |
| <50** | 90-100 | 90-110 | 90-110 | ||||
| 60** | 90-100 | 110-120 | 110-120 | ||||
| 70** | 100-110 | 115-125 | 115-125 | ||||
| 80** | 100-110 | 125-135 | 125-135 | ||||
| 90** | 110-120 | 135-145 | 135-145 | ||||
| 100** | 120-130 | 135-145 | 145-155 | 140-150 | |||
| 110 | 130-135 | 145-155 | 150-160 | 145-155 | 165-175 | 150-160 | <150 |
| 120 | 135-140 | 145-155 | 150-160 | 150-160 | 170-180 | 160-170 | <155 |
| 130 | 140-150 | 155-165 | 160-175 | 155-165 | 175-185 | 165-175 | 150-160 |
| 140 | 145-155 | 160-170 | 165-180 | 155-165 | 175-185 | 170-180 | 150-160 |
| 150 | 145-155 | 165-175 | 170-180 | 160-170 | 180-190 | 170-180 | 150-160 |
| 160 | 150-160 | 165-175 | 175-185 | 160-170 | 180-190 | 174-185 | 155-165 |
| 170 | 150-160 | 165-180 | 175-185 | 160-170 | 180-190 | 174-185 | 155-165 |
| 180 | 160-170 | 170-180 | 180-190 | 165-177 | 185-195 | 180-190 | 155-165 |
| 190 | 170-180 | 170-180 | 180-190 | 165-177 | 185-195 | 185-195 | 155-165 |
| 200 | 170-180 | 175-185 | 180-195 | 165-177 | 185-195 | 185-195 | 155-165 |
| 210 | 175-185 | 175-185 | 180-195 | 165-177 | 185-195 | 185-195 | 155-165 |
| 220+ | 180-190 | 180-190 | 190-195 | 170-180 | 190-195 | 185-195 | 155-165 |