How do I resize a flat vector icon so that it preserves hard edges?

I recently purchased Drew Wilson's Pictos icon library. It is a library of flat, monochromatic icons for use on the web and e开发者_如何学Golsewhere. The only issue is: they're vectors. I know my way around Illustrator a little bit, but ultimately I want to import these icons into Photoshop CS4 and resize to various dimensions.

When I import an icon and resize it to, say, 20x20 pixels, I notice that there is a fair bit of aliasing around the edges of the icon. I'm sure there is some magic number where the edges of these icons will remain crisp, but I can't find any option or setting that will allow me to size these icons properly.

How can I snap these icons to the closest size that removes or minimizes the aliasing?

The aliasing / pixelating is because vectors export out of illustator @ whatever size they're copied @

Try opening the icons in illustrator... scaling them waaay up

And then just keep a copy of the huge ones in a separate layer

Copy that layer when you want to scale it down ..annnd that way you'll have a copy to work with..and u won't have to re Open the file every time u need to make an edit

And a good rule of thumb for pixelation is

You can always size down.. but sizing up will create pixelating in bitmaps

Chances are, you have your logo in .eps format. If you do, open your .eps file in Photoshop. A dialog box will pop up asking the size you want to import. Be sure to select RGB color if this will display on the web. Select the Anti-aliasing checkbox. When your file opens up, zoom in, and you'll notice that Photoshop has neatly anti-aliased all of your edges for you.