Retail on this is $40.  I bought it and never used,

One size fits all - neoprene material stretches to fit up to a 44" belly. (Measure hips or belly not pant size) Soft and comfortable enough to wear directly against your skin.

• Surgical grade elastic holster fits small subcompact, compact, and even full size pistols and revolvers. 380, 9mm, 40 auto, 45 ACP, 38 special, 357, and 10mm etc.
• Can be worn inside the waistband, outside the waistband, cross body, appendix position, 5 O'clock position (behind hip), small of back, and even high up like a shoulder holster or concealed carry shirt.
• Bellyband Holster is available in right and left hand draw. Fits Glock 19, 23, 38, 25, 32, 26, 27, 29, 30, 39, 28, 33, 42, 43, 36, Smith and Wesson, Bodyguard, M&P Shield, Sig Sauer, Ruger, Kahr, Beretta, Springfield, Taurus, Kimber, Rock Island, Bersa, Kel Tec, Walther, and more.
• Spare magazine pocket and optional use retention strap provided. (you can cut off the retention strap if you prefer best speed over extra retention support)