The US use different terms for the lop rabbits to the UK and it gets a little confusing
but a holland lop is smaller than a dwarf.
The Holland Lop is the US equivalent of a UK mini lop - they're the smallest lops and weigh around 1.6kg. Dwarf lop is a UK term (they're known as mini lops in the US - told you it was confusing :lol::lol
and they're slightly bigger at around 2.5kg-ish.