Hello Victor, The depth of the basin is 5-7/8 inch form the top of the sink surface to the top of the drain. This dimension is provided on this particular spec sheet, but we appreciate your feedback in letting us know about the other models. You can view the spec sheet here: https://images.homedepot-static.com/catalog/pdfImages/9f/9fe9f51e-a90e-4909-b71b-3ce4628e90ec.pdf I hope this helps and thank you for choosing TOTO!
Hi Munkybubs, It looks like this listing is for the pedestal and sink combination. When shopping for a TOTO pedestal sink, look for the model number to start with "LPT". This means it includes both. If you only see an "LT" that is sink only. If you only see a "PT", that is pedestal only. TOTO does not sell to customers and must rely on individual stores to properly convey product information. We will work with Home Depot to make the descriptions more clear for customers, so thank you for the great question!