These are comfortable Vibram soles, that need to be cemented to the topsole with Barge or other shoe contact cement. They can be cut to size on a bandsaw. The heel is integrated in the sole.
They are available in 10 1/2″ and 12″ lengths.
Ideally, the leather or felt topsole would have a thin piece of “rubber” mid-soling under it, which will adhere more reliably to the unit sole. The smooth soling sold in this store is ideal for this purpose.