This is the large I believe  to me it measures 18x23 it's new in box what u see is what u get The Sew Steady Portable Table Dream World  Sewing Machine Extension is a versatile and convenient addition to any sewing enthusiast's workspace. Made by the brand Sew Steady, this extension table provides a stable and ergonomic work surface for your sewing machine, allowing for more precise and comfortable stitching. With its portable design, this extension table can easily be moved and stored when not in use, making it a practical and valuable accessory for any patchwork or quilting project.