Character, cloth and dynamic animation at a small scale

Hi

I want to animate the following character in a normal sized room, say 300cm x 300 cm x240 cm (H). Currently it is modelled to a height of 10 cm. The chain mail are rings cloned to a hidden polygon and I plan to animate the hidden polygon as cloth or soft dynamics. I did a couple of tests at this size and larger scale and got unusual results at a small scale - lag excessive movement and jittering. What things/settings do I need to consider when animating at this size?

Thanks
Chris