Certificate key size affects only the number of new connections per second in the LCU computation for billing. The following table lists the value of this dimension for different key sizes for RSA and ECDSA certificates. RSA certificates Key Size: <=2K  New connections/sec: 25
Key Size: <=4K  New connections/sec: 5
Key Size: <=8K  New connections/sec: 1
Key Size: >8K New connections/sec: 0.25
ECDSA Certificates Key Size: <=256 New connections/sec: 25
Key Size: <=384 New connections/sec: 5
Key Size: <=521  New connections/sec: 1
Key Size: >521  New connections/sec: 0.25