Hi, good day! Thank you for posting a query about the Toto TCU624CRE#01. We can’t seem to find any information regarding this lid’s dimensions. This tank lid fits the Toto MS624 and the Toto MS626 only. If you own either of this tank, start placing your order by clicking Add to Cart, provide the required information, and we’ll take care of the rest. However, if you own a different tank model, kindly let us know your tank’s model number by contacting our Customer Support at 435-868-4020 from 7 AM to 7 PM MST (Mon-Fri) or email them at support@plumbersstock.com, so we can advise you accordingly. Thank you for trusting PlumbersStock. Have a great day!