This is a great stand to hold the weight of the umbrella we purchased through Wayfair.  We bought the Desmond 12'x9' Rectangular Cantilever Umbrella and these 4 panels slid in perfectly.  We spent a couple HOURS filling them with sand, so beware that "playground sand" from a Home Improvement store is kind of... wet?? Sorta?? So, it doesn't flow in like dry beach sand, but boy, it's heavy (which is a good thing). I've attached pics of the umbrella base and also how we slid part of it under our outdoor seating. I probably should have cleaned it off before the photo, but I'm keeping it real. ;-)