Tuckable IWB Mag Pouch for Smith & Wesson M&P Shield Fits 9mm & 40 Cal. Fits magazines 5/8" to 3/4". Designed to fit staggered stack magazines like a Glock 42, or S&W Shield Tuckable Holster (You can tuck your shirt in.) Lifetime Warranty Ambidextrous (Clip can be moved to RH or LH position.) Under the Belt (Clip is designed to sit underneath the belt for total concealment.)