Buy what you can afford. You'll still love it!
I have one of the large bifold wallets and recently picked up one of the coin purses. I've had my wallet for years now and although it resides in my backpack now it still holds all my cards and keeps them organized. The coin purse reminds me of my grandpa. His coin purse either wasn't as well made or had a lot more miles on it. Love the closure. Perfect size and keeps my pocket much more organized. Thanks, Dave and crew!