These duffel style swimming bags are a great size, have a drawstring handle, an easy access seperate zipped compartment for goggles, and are made from tough, hardwarding fabric. Best of all they are waterproof, so you minimise the risk of water from those soggy togs leaking out of them! Also, chlorine won't fade the fabric.
Dimensions:
Bag - 27cm x 45.5cm x 23cm
Front Zipped Compartment - 17cm x 16cm