Tell the assistant what you're moving — it estimates your volume (with a -8% packing buffer), checks large-furniture and sofa constraints, and recommends the smallest van that fits your job.
L-shaped sofa
Needs at least an Extra-long / High-roof Van.
3-seater sofa
Needs at least a Large Van (LWB).
Student moves
Default Small Van, upgraded only when needed.
Van Size Assistant
Volume estimate + recommended van