Green Peas are nearby analogs of high-redshift Ly \alpha -emitting galaxies ( LAEs ) .
To probe their Ly \alpha escape , we study the spatial profiles of Ly \alpha and UV continuum emission of 24 Green Pea galaxies using the Cosmic Origins Spectrograph ( COS ) on Hubble Space Telescope ( HST ) .
We extract the spatial profiles of Ly \alpha emission from their 2D COS spectra , and of UV continuum from both the 2D spectra and NUV images .
The Ly \alpha emission shows more extended spatial profiles than the UV continuum in most Green Peas .
The deconvolved Full Width Half Maximum ( FWHM ) of the Ly \alpha spatial profile is about 2 to 4 times that of the UV continuum in most cases .
Since Green Peas are analogs of high- \it { z } LAEs , it suggests that most high- \it { z } LAEs likely have larger Ly \alpha sizes than UV sizes .
We also compare the spatial profiles of Ly \alpha photons at blueshifted and redshifted velocities in eight Green Peas with sufficient data quality , and find the blue wing of the Ly \alpha line has a larger spatial extent than the red wing in four Green Peas with comparatively weak blue Ly \alpha line wings .
We show that Green Peas and MUSE z = 3 - 6 LAEs have similar Ly \alpha and UV continuum sizes , which probably suggests starbursts in both low- z and high- z LAEs drive similar gas outflows illuminated by Ly \alpha light .
Five Lyman continuum ( LyC ) leakers in this sample have similar Ly \alpha to UV continuum size ratios ( \sim 1.4 - 4.3 ) to the other Green Peas , indicating their LyC emission escape through ionized holes in the interstellar medium .