Hello Ross. So far the maximum products we imported was 22,000, but I think the toaster can handle that many products. The import would take a few hours, because the system . The CSV would have to be well prepared as well. Obviously, you need to handle the navigation / flow for your website in a smart way with that many products. Fortunately seotoaster allows for fast deployment. Send us an email at info@seotoaster.com if you need advice and support on the matter.