I own at least 7 different styles of holsters for my shield to find the perfect fit for me!
All kydex iwb and owb, to all leather, to remora one piece with rubber gripy exterior to leather/kydex hybrids.
1st you have to decide your tolerance level. Some people can stick a tree on their hip and walk around all day and never give it a second thought. While some more finicky people can barely carry an iwb pocket knife with belt clip and not be annoyed. I lean more toward the second (thus 7 or kore holsters for the same dang pistol!)
2nd as stated before. An excellent very stiff belt will spread the load across your waist band more.
3rd. If it's smaller you'd think less noticeable? Right? Not necessarily true. A lump is worse than a long sloping rise.
I have the iwb all kydex and that's about as small as it gets. But it is so narrow (front to back of body) that it feels like a knot digging in my side. I've tried the all leather and just wasn't my perfect either. Even the N82 ( which has a large softer back "plate" against the body is more bulky to me than my favorite. And that is the foxx or alien kydex/leather hybrid design so many seem many like. I continually go back to mine. It's not that same brand but same hybrid design and works the best for me.
Just make sure it has 2 belt clips and has a high section so the upper part rear sights area doesn't poke you in the side nearly as bad!
I'm thin so I actually heated mine up with a lighter and bent the 2 tabs that have the rivets back so it wraps my body better. Helped me a lot!! It did loosen up the hold on the gun by bending the tabs back. But I found when wearing the holster inside the waist band my hip curved the leather around my hip enough that the shield was extremely secure. Just not as tight when laying on the dresser.
I have also have:
-paddle holster. Bulky and bounces. Not really concealable.
-Lower back all leather, waking around is great, sitting down sucks. And belt must be partially removed to add/remove the holster.
-shoulder. Annoying as can be for me. But would be good if traveling a lot in a vehicle. Gun is easier to access in a car seat than on a hip.
-belly band, this awesome in the fact you barely notice the gun and 2 mags are there. Probably because your so annoyed by the belly compression of the belt! Lol. Plus it's very hot.
-the all kydex owb raven style bounces on my hip and is too stiff when sitting and/or bending over for me.
-I have found comfort in an ankle holster for my pocket pistol. Smaller than my shield. But not an easy access when needed.
-rumora ( all sticky exterior material) works great for storing you firearm in a glove box and want to run in a store" real quick and put back in the glovebox as soon as you return to the car. But when wearing for extended time periods it shifts a lot.
I've found I use different holsters for different "situations". This me and you may he completely different.
Hope I could help in some way

Kmac