Okay, first thing, these boxes might list dimensions in the 25" wide realm, but, I measured one of the boxes at a distributor, and it clocked in at 27.5". When I measured the width of my fridge, it was 27". The dimensions for the different brands all vary slightly, so you might find one that's a little smaller, but you will need to confirm with the seller the actual exterior dimensions.
It depends on your hydration and your flour strength, but these large types of boxes will comfortably fit six 350 gram dough balls without touching, so, if your fridge can accommodate them, I think that's a wise direction to take.
The downside, though, is that, with these boxes, you tend to get what you pay for, and the cheap ones can be problematic- they can bend when you lift them, the plastic can crack, and they can fail to seal properly when stacked, and cause your dough to dry out/skin over.
The one exception to the cost is whether or not you have access to a wholesaler like Restaurant Depot. A quality $45 box/lid/scraper online might run you $22 at RD.
I spent a couple hours reading reviews, and it looks like the MFGs will give you the most durability, but they're also the most expensive:
The Cambros cost less, but are still well regarded:
https://www.katom.com/144-DB18263P148.html
https://www.katom.com/144-DBC1826P148.html
Purchased from Katom, I'm showing $32 for the box and lid, including shipping.
You might see videos with some folks using metal putty knives to remove the dough from these boxes. If you use metal on a plastic tray, it will scratch it, and shorten it's life exponentially. The plastic scrapers that are specifically made for these trays work very well, but they aren't cheap.
https://www.amazon.com/Plastic-Dough-Scraper-Handle/dp/B0044FIYXW
You might be able to get away with something like this:
https://www.amazon.com/Design-Molyveva-Scraper-Machine-Kitchen/dp/B077DV65DZ/
But I can't make any guarantees. You could also check your local dollar store for a plastic spatula- or maybe a silicon spatula, but it would have to be thin, and the plastic couldn't be harder than the plastic that the box is made from.
If your refrigerator is too small for the large trays, there are smaller trays:
https://www.amazon.com/DoughMate-Artisan-Dough-Tray-Kit/dp/B00449IEM4/
The price is far from ideal, the quality, from what I've read, is lower than the cambros, and the dough capacity is kind of ridiculous. Six 300 dough ball might fit in 2 boxes, but 350 might be tight- at least tight without touching.
Rather than spend the money on doughmates, I'd look into one of my other container recommendations:
https://www.reddit.com/r/Pizza/comments/8g6iti/biweekly_questions_thread/dyd6kmk/