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I have around 10 pillows that I'm always trying to mix and match. My latest gadget is a set of pillow lifts from Purple. They are flat foam pads 1" and .5" that lift your pillow just a little so it fits you better. Technically they are sold as an accompaniment to their brand of pillows but they work fine with any pillow. I always feel my pillows are just a little too low-I've also been using a memory foam firm pillow with a molded shape -here it is on amazon-https://www.amazon.com/Copper-Fit-Ultimate-Memory-Sleepers/dp/B085BW6SNW/ref=sr_1_6?keywords=angel+sleeper+pillow&qid=1637163540&sr=8-6
but I found it in a store for $20. I don't know how it will hold up but I like it for side sleeping-sometimes I use one of the lifts with it. Its worth 20 not sure its worth the Amazon price.