Mesh butterfly wings with on/off particle effects, on/off flap animation, and HUD with 36 texture options.
See item in Second Life
Perfect Mesh Wings
If you are looking for mesh wings, it doesn't get better than this. The color selections are incredible, plus they are mod so you can turn on glow or set a color on them. They are resizeable by hud. I don't know how small they'll go, but I'm using them on a Toddleedoo Kid. Given that they also size up, I am sure they can be used by extremely large avatars as well. And there's one thing that people might not think about when looking for wings, and that is a thing called "aspect ratio" - these wings are very pleasing to the eye because they are not too tall for their width, and not too wide for their height.
I edited them set color to bright yellow and glow to .05 and came up with this: https://gyazo.com/deb4ab1119da3ddfdc6e82e99f84f48e
Spectacular!