Vlan subnetting trouble for about 60 different vlans. HELP!!!

Hi everyone, I’m having some trouble with trunking networks. I’m new to this, so any help will be great.

The question is about the subnetting for these 60 switched vlans. I have the trunks working and the vlans, but at assigning subnets everything falls apart.

What is the best subnet for these 60 new vlans? what about /30 for the 4 routers and /28 or /27 for the vlans? every vlan may require around 10 new ips.

Any help will be appreciated.