Want massive calves? Get fat for a few years. Obese people develop big calves because they need to shock-absorb their mass and power their steps. So let's apply the same logic to your calf training minus the excess fat.
Grab weights and walk across the gym on your tip toes.
Tip Toe Farmers Carry
Worried about looking silly? Then continue to enjoy your skinny calves. Otherwise take some heavy dumbbells for a walk on your toes.
Do this instead of using the seated calf machine. It's ineffective for calf growth and a lazy way to feel like you're training.
Walk only on your toes with a weight that allows you to maintain full ankle plantar flexion. This strengthens your feet, develops control at ankle end range, and hammers the calves.