Actually, for snowshoeing you want something closer to trekking pole length - ski poles will be too long. Look for something that feels comfortable with your arms at your sides, bent at the elbows so that your hands are just a bit higher than your elbow when gripping the poles with their tips on the ground in front of you.

I use my GossamerGear one-piece carbon fiber poles all year round - swapping out the basket for a snow basket in winter.

Adjustable length poles are nice in winter, though - consider a lightweight pair you can adjust. I have a pair of really light Lekis I bought for traveling that make fine winter poles as well.