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
11-inch iPad Pro (1st and 2nd generation) and 12.9-inch iPad Pro (3rd and 4th generation) with the 20W USB-C Power Adapter
iPad Air (4th generation) with the 20W USB-C Power Adapter