Hello Diane,
Thank you for taking the time to leave us your thoughts on the Delta Faucet 60" X 30" Bathtub Wall Set, model 40204. We appreciate your feedback.
I am sorry to hear that this product did not meet your expectations. As the manufacturer, we are committed to supplying consumers with a quality product that delivers the expected performance.
The shelf depth measures 4 5/8" (11.75 cm).
Installation Guide –
https://images.homedepot-static.com/catalog/pdfImages/24/24d984f6-63a2-4aae-aee1-b2198a9c6780.pdf
Tech Specs –
https://images.homedepot-static.com/catalog/pdfImages/af/af8b72e4-567d-4049-83ae-0c46b97ae712.pdf
Please contact us with any questions or for further assistance.
Thank you for being a loyal Delta Faucet customer.
Best Regards,
Emma