It’s a little late for an online order outside of amazon but my personal preference would be an ultimate guard boulder. This is their online amazon store I have bought from numerous brands but for a generic gift that is solid quality that’s the place to go. I love their binders and boxes.
https://www.amazon.com/Ultimate-Guard/s?k=Ultimate+Guard
The specific item I have bought for myself in different colors. I personally like this one and I have bought two of them. They actually fit a large amount of cards so it may be too large but the size is still very useful for a collection of cards.