Here's a FREE Tutorial for your DIY Clutch Bag. You can fit an iPhone in the little pocket behind the integrated zipper pouch, and then you'll have a nice sized compartment in front of the zipper pouch for keys, lip gloss, and a little notebook. And (of course), fit cards and cash in the zipper pouch. Yay! It's everything you need and nothing you don't.
You may want to check this Sunshine Wristlet FREE Pattern, too!