Improved walkway space Adjustment spacers for more stable fit Securely holds standard mug Recessed area for holding utensils, etc. Improved handle holding clearance Fits higher percentage of standard walkers Adjustment spacers are removable Fits standard 2 button release folding walkers--note measurements. Does not fit bariatric, juvenile/junior, extra wide, paddle release or single button release (high bar) walkers. Here are some example walkers that would be a perfect match for the Contour Tray: