RC bashers come in a wide range of sizes, from just a few inches to several feet long. Their size is often shown as a ratio, or scale, that compares the model to the full-size vehicle — a 1/10 scale Ferrari, for example, is one-tenth the size of a real one. If you want a small basher to run indoors, choose higher ratios such as 1/24. For a big model to bash on rugged outdoor trails, look for lower ratios like 1/8 and 1/5.