How Much Space Should I Partition for Linux?

A typical Linux installation will need somewhere between 4GB and 8GB of disk space, and you need at least a bit of space for user files, so I generally make my root partitions at least 12GB-16GB.

How big should a Linux partition be?

In most cases, you should at least encrypt the /home partition. Each kernel installed on your system requires approximately 30 MB on the /boot partition. Unless you plan to install a great many kernels, the default partition size of 250 MB for /boot should suffice.

Is 100gb enough for Linux?

100gb should be fine. however, running both operating systems on the same physical drive can be tricky due to EFI partition and bootloaders. there are some strange complications that might happen: windows updates can overwrite on linux bootloader, which renders linux unreachable.