The dimensions are 21.5x21.5x10.5 .
I'm not sure where this is manufactured Please allow me to refer you to the manufacturer's customer service where they should be able to assist you with this. Here is the contact info: Duramax (US Polymers) - tel 800-483-4674 and their email is supp[email protected] and their website is www.uspolymersinc.com