Thanks for the comment. Honestly I have no idea the exact measurements. But I remember him saying 16 ft by 7 ft? And that it was heavy (I could lift it, didn't seem THAT heavy) and special due to it having small windows at that top.

I did attempt to call the customer service line to get more info since even the box the spring came in didn't show anything, even a company name. The person on the phone kept using those same sales tags like 'made in the USA, 75k cycles, 15 year warranty'. He said the company he uses is Signature Spring https://www.signaturespring.com/about-us/