Saint Kitts and Nevis is approximately 261 sq km, while Christmas Island is approximately 135 sq km, making Christmas Island 51.72% the size of Saint Kitts and Nevis.
This to-scale map shows a size comparison of Saint Kitts and Nevis compared to Christmas Island. For more details, see an in-depth quality of life comparison of Christmas Island vs. Saint Kitts and Nevis using our country comparison tool.