Good decision on wanting to wear a helmet.

Yes, you should go to several LBS's and try on different brands and models of helmets because they make each one a bit different. I could not find a helmet to fit my head snug enough so that it wouldn't come off if hit from the side. It appears my head is longer then it is wide. I went to several LBS's and even Walmart and nothing. Then I read a review of a person who had a similar experience as mine and bought a Lazer helmet and it fit. So I bought a Lazer helmet and it fit's perfectly. This helmet fitting problem for me is relative new, I had some issues before but found that the Original Bell, then later a Bell Metro fit great, but the original is no longer made and the Metro was too hot for hot days. I also once had a Garneau that fit perfectly but they changed their designs and now it no longer fits. No local LBS sold the Lazer I had to order on the internet.

By the way speaking of Walmart helmets, they are rated by the same standard as all helmets are and they have to pass those standards in order to be sold in the USA. The Walmart helmets, which they do sell the lower end of Bell an Schwinn branded helmets but are not made as sturdy as others; by sturdy I mean the straps are flimsy and plastic internals are thin and highly likely to break in normal usage.

Perfect fit is based on this: http://www.bhsi.org/fit.htm One paragraph speaks of putting your palm on the front edge and if it moves more then an inch after adjusting the straps then it doesn't fit your head. BUT they left out one important thing...the same applies to the side!! If the helmet moves more then an inch when you do the same thing on the left (or right) side of the helmet it doesn't fit, and that was my problem with today's helmets until I found the Lazer. I had no problems with front to rear movement with a lot of helmets, it was the side to side issue. This is important because if your in an accident you want the helmet to stay on, not get ripped off your head leaving your brains exposed, or the helmet moves enough and there's a secondary impact (which occurs in a lot of accidents) and the helmet has shifted exposing a vital area that you strike in the secondary impact.