Miami Dolphins Riddell MINI Football Helmet NEW IN BOX. This listing is for a Miami Dolphins Riddell MINI Football Helmet NEW IN BOX. Based on where I got this from, I think it is an early production of these. If someone knows more, please let me know! The helmet comes in its original factory box. It is in brand new MINT condition. The front and back of the box are shown in the scan so the buyer can see both sides. One helmet is included with the purchase of this item. The box is about 6.5 inches by 4.5 inches by 5 inches. Neat piece of history!!!