This Cardboard Virtual Reality Headset is very easy to be assembled. Compatible with most smart mobile phones within 4-5.5 inch screen. It would display vivid 3D world through your smartphone by downloading a virtual reality app. 0.47" H x 5" W x 7.8" L. Imprint area is 2.00" H x 3.00" L and includes a 1 Colour Imprint on 1 Location. Packaging: Bulk. Please call for rush delivery availability or multi-colour/multi-location imprints.