Apple recommends the following pairings:
12-inch MacBook with USB‐C port with the 30W USB‐C Power Adapter
13-inch MacBook Air with Thunderbolt 3 (USB-C) ports with the 30W USB-C Power Adapter
13-inch MacBook Pro with Thunderbolt 3 (USB-C) ports with the 61W USB-C Power Adapter
15-inch MacBook Pro with Thunderbolt 3 (USB-C) ports with the 87W USB-C Power Adapter
16-inch MacBook Pro with Thunderbolt 3 (USB-C) ports with the 96W USB-C Power Adapter