Size 14 Extra wide width women's casual in the US
Designer Shoe Warehouse is a discount shoes & handbags chain with many stores across US & some in Canada too. Shoes available online up to size 13 US. Larger sizes may not be as common in store. Free US shipping, exchanges & store returns. Free VIP rewards program with perks.
High end discount store which sells online & also has many stores across the US. They've tons of 11 and 12s online, with some 13s and even 14s too. Size selection in store may not be as good as online though. See their current & upcoming daily flash events here where you can grab big deals for a short time. It's worth checking the main Nordstrom site shoe department too which also goes up to size 14. They've a bigger range of large size shoes & often have some great deals too.
You can get great deals on large size shoes at Amazon with a bit of patience. Their own Amazon Essentials range does fashionable styles at great prices up to size 15 US. The women's shoes department goes right up to 16 US, although many of the largest sizes will either be Chinese brands or unisex. If you have Amazon Prime, many shoes are eligible for free, fast shipping. Plus you can even try before you buy or avail of their personal shopper service.