3mm thick foot parts to prevent forward slippage and cushion impact. - Size: Free size - Thickness: 3mm - Quantity: 2 pieces - Purpose: Prevent forward slippage, cushion impact Model number: 4971671191662 Color: Transparent #Columbus #4971671191662 ☆ These are Columbus transparent insoles, 3mm thick. ☆ They are quite thick and can be used to adjust mules that are about one size too big. ☆ I'm selling them because they were thicker than I expected. ☆ Double-sided transparent tape is also included. ☆ They have only been tried on, but please refrain from purchasing if you are sensitive to used items, as they are insoles. ☆ Immediate purchase is OK.