Recommendations for oversized button ups

I'm looking to upgrade my wardrobe with some oversized button ups, particularly for the summer. I'm not too sure what type of fabric, but probably oxford (I think that's ideal for year round and for comfort). I've also seen some in broadcloth as well.

I'm aiming for something along the lines of Uniqlo prices. I see a lot of options for this as it's a pretty standard clothing item. I'm also not sure what colors and designs to get (probably white and black and maybe light pink for a bit of a flair).

Does anyone have any specific recs? Also, any general tips around styling would be great!
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