Hello. Thank you for your question. We recommend the screen be no larger that 30" x 30". An additional set of feet may help with an oversized piece of glass but we cannot predict the stability with pets leaning again it. The feet were designed to be used in a freestanding manner without any other pressure applied to it.

Do you have different styles of feet? And can you order them separate if you already have your own piece of glass?

Hello -

Here are links to the different fireplace screen feet we offer:

https://www.houzz.com/products/stockholm-base-only-for-glass-fireplace-screen-set-of-2-stainless-steel-prvw-vr~21546267

https://www.houzz.com/products/copenhagen-base-only-for-glass-fireplace-screen-set-of-2-aluminum-prvw-vr~21546508

https://www.houzz.com/products/copenhagen-bronze-limited-edition-base-only-for-glass-fireplace-screen-set-of-2-prvw-vr~47726153

Please note we sell the feet only and the glass is provided by the customer. Glass specifications can be found on each firescreen feet web page.

Please let us know if you have any questions.

Thank you.