Believe it or not, I was on even shorter skis last year.
Shorter than 147??
Someone should take whoever rented those skis to you out back of the barn and give them a good paddling.
Do you think I should just start with long/appropriate skis right off the bat now that I'm past the awkward beginner stages? Will I have to unlearn bad habits by moving up in size more gradually? Gosh, I've never really considered this at all.
Realizing that you have never seen me ski (solid non-graceful intermediate who likes wide groomed or ungroomed blue runs), what size and type ski would you expect me to end up with as 5'8" and 140lbs, East coast ice/crud skier who never really aspires to ski aggressively steep stuff (would like to eventually do blacks though)? Just wondering what I should request from the rental shop if I do take these back? Thanks Divas!
I can think of no good reason to sneak up on the right length ski, because dramatically short skis are only likely to hold you back once you're past the first couple of days of 'never-ever'-ness. 155 isn't as desperately short as 147, but AG knows whereof she speaks, and I'd trust her when she says to get at least into the upper 160s.
To give you a comparison, a "solid intermediate" skier should be on something between nose high and forehead high (longer if there's significant rocker), but your 147cm skis probably come up to the tip of your shoulder, maybe your collarbone. Their "sweet spot," the fore-aft balance point where the skis come to life, is much smaller than necessary, thus harder to find especially when you're in a tight spot. The tips are more easily deflected by crud, ruts, or chop. Even if you can get them on edge, they're likely to be squirrelly at even just cruising speed. And on ice, there's just not enough edge to hold you. None of this builds confidence.
As for what to expect on a longer ski, well, it'll feel
very weird and awkward for a little while. Chances are that you skid and muscle your short skis around than more than you use better turning skills, and the longer skis probably won't let you cheat as much, so at first you might think longer skis are more tiring to ski. However, once you start to learn to use that length to balance against and use it as a tool to have fun on the mountain, you're going to be amazed at what you can do and how much easier it is to do it. If you're really worried about it, just schedule a lesson for the specific purpose of getting oriented to your new tools.
I think you're going to enjoy the transition to a ski that can really perform for you!