Here's a few relatively small blades from my collection:
From the top down...
Buck/Hartsook Ultralight $40.00 msrp
Benchmade 10610 Benchmite II
$35.00 msrp (Discontinued)
Spyderco Dragonfly Stainless Steel $89.95 msrp (FRN handle version $69.95 msrp)
Case Mini-Blackhorn $9.95 @ Lowes Hardware
Cutco Pocket Knife (DD serrated edge version) Price varies from your local Cutco seller.
Gerber Curve (Blue) $13 msrp
*In addition to the locking knife blade, it has three screwdrivers, a nail file, and a bottle opener/spring clip.
For a size comparison, the bottom knife is a common Victorinox Classic keychain knife.
Thought it worth mentioning that the Case Mini-Blackhorn is one of my favorite knives. It's under $10, it's made in the USA, and it's a great size, shape, and blade profile for daily use. Plus it weighs next to nothing. I've given away a bunch to friends and family over the years and they've held up quite well.