If you wanna know what ski size you should get do yourself a huge favor and GO DEMO. Asking on here does nothing. This crowd ranges from expert slalom skiers to expert backcountry boys, two complete opposite ends of the size spectrum.
If you're too fukkin shitty to realize what ski length is right for you then rent until you know.
If you're growing add at the most 5cm. You're gonna need new fuckin skis the next year anyway if you ski hard. Then your old pair can become rail skis or rock skis....whatever you do.
Some people don't have access to demo skis. Fine, then try your friends skis. Bindings adjust almost one full size, and you can fit in your friends boots if you want to.
I say if some asks for a ski size suggestion refer them to this post.
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!!!!!!!!!!!!!!!!DDDDEEEEEEEEEMMMOOOOO!!!!!!!!!!!!!
Quit pussy footin around with all that equipment shit. The better you get the more you'll know what you like and you don't need to ask these questions.
There, I feel better.