Basic Large: https://codepen.io/Zerk/pen/mWNXVy
Circuit: https://codepen.io/lukasoe/pen/BpMNjw

Custom dropdown arrow: https://codepen.io/danield770/pen/bgJOyV
Custom dropdown arrow 2: https://codepen.io/vkjgr/pen/VYMeXp
Custom dropdown arrow 3: https://fabriceleven.com/design/clever-way-to-change-the-drop-down-selector-arrow-icon/

Subscription: https://codepen.io/RRoberts/pen/kXvVrR
Large Jumper: https://codepen.io/web-tiki/pen/JXwLGQ
Terminal / Transit: https://codepen.io/yunntan/pen/rayKjK

Not loading:
https://codepen.io/morten-olsen/pen/QbvBYy
https://codepen.io/chrissimari/pen/shyDC