  We report on the measurement of the size of the particle-emitting source from
two-baryon correlations with ALICE in high-multiplicity pp collisions at
$\sqrt{s}$ = 13 TeV. The source radius is studied with low relative momentum
p-p, $\bar{\rm{p}}$-$\bar{\rm{p}}$, p-$\Lambda$ and
$\bar{\rm{p}}$-$\bar{\Lambda}$ pairs as a function of the pair transverse mass
$m_{\rm{T}}$ considering for the first time in a quantitative way the effect of
strong resonance decays. After correcting for this effect, the radii extracted
for pairs of different particle species agree. This indicates that protons,
antiprotons, $\Lambda$, and $\bar{\Lambda}$ originate from the same source.
Within the measured $m_{\rm{T}}$ range (1.1-2.2) GeV/$c^{2}$ the invariant
radius of this common source varies between 0.85 and 1.3 fm. These results
provide a precise reference for studies of the strong hadron-hadron
interactions and for the investigation of collective properties in small
colliding systems.
