The Gypsy Quilter Mask Bars, package of 100 bars, each 3.5 in. long. Use these self adhesive Mask Bars to customize your face masks for a perfect fit. Simply remove the release paper and stick the bar onto the portion of your mask that sits over the bridge of your nose, then bend it down to fit. You can also sew a channel into your mask and insert the Mask Bar to make it permanent through washings. Note: Do not iron over the Mask Bar.