item description here at syw.com seems contradictory and goofy to me - you might be better off asking apple directly instead of asking here
"The 9.7-inch iPad Pro, 12.9-inch iPad Pro, iPad Air 2, iPad mini 4, and iPad mini 3 models with Wi-Fi + Cellular can use either the Apple SIM card or a carrier-supported nano-SIM card. The 9.7-inch iPad Pro includes an embedded Apple SIM card. iPad Air, iPad mini 2, and iPad mini models with Wi-Fi + Cellular use the nano-SIM card. All other iPad models use a micro-SIM card. Micro-SIM cards cannot be used in devices that use the Apple SIM or another nano-SIM card."
call 1‑800‑MY‑APPLE (or use their online chat feature)apple.com/shop/buy-ipad/ipad-mini-4apple.com/ipad/LTE/