Pet Seat Belt What Size Pet Carrier Do I Need For Yorkies?

What size pet carrier do i need for yorkies? - pet seat belt

I will Chihuahua puppy that is only now that companies are attached to the smooth ride (the flats with the seatbelt )....... I wish they had the hard plastic kennel is a safe way to travel and I in a safe place when we travel in a caravan outside LOT .....( )...... What size should I do to avoid buying two or three, but it must be safe and happy ..... I looked at 19x13x10 which is large enough (which does not permit, I'm seeing my dog into the store ).......