  Enormous enhancement in the viscosity of a liquid near its glass transition
is generally connected to the growing many-body static correlations near the
transition, often coined as `amorphous ordering'. Estimating the length scales
of such correlations in different glass-forming liquids is highly important to
unravel the physics of glass formation. Experiments on molecular glass-forming
liquids become pivotal in this scenario as the viscosity grows several folds
($\sim 10^{14}$), simulations or colloidal glass experiments fail to access the
long-time scales required. Here we design an experiment to extract the static
length scales in molecular liquids using dilute amounts of another large
molecule as a pinning site. Results from dielectric relaxation experiments on
supercooled glycerol with different pinning concentrations of sorbitol and the
simulations on a few model glass-forming liquids with pinning sites indicate
the robustness of the proposed method, opening a plethora of opportunity to
study the physics of other glass-forming liquids.
