M4 is the instance type you use when in doubt. Developers who sign up for AWS get this instance type for up to a year. This tier has six subtypes:
| Instance Type | vCPUs | Memory (GiB) | Dedicated Bandwidth |
| m4.large | 2 | 8 | 450 mbps |
| m4.xlarge | 4 | 16 | 750 mbps |
| m4.2xlarge | 8 | 32 | 1,000 mbps |
| m4.4xlarge | 16 | 64 | 2,000 mbps |
| m4.10xlarge | 40 | 160 | 4,000 mbps |
| m4.16xlarge | 64 | 256 | 10,000 mbps |