The article explores how changes in the size of futures contracts affect trading activity and price volatility. After contract splits, trading frequency increased, leading to higher daily price volatility. Conversely, after a reverse contract split, trading frequency decreased, resulting in lower volatility. Small and large trade sizes had a significant impact on price volatility post-contract splits. Overall, the changes in contract size were successful as trading volume and open interest levels exceeded pre-change levels within three years and continued to rise.