Does XS premier exist?

Lids has that 50% off sale and I've been dying to buy a jets heritage classic jersey.

I'm an athletic female who typically wears mediums to fit hoodies and other clothing underneath for the cold winter trips to the arena. The small easily fits me. I've never seen an XS and can't find any sizing charts on it. Does it really exist?

They only have it as a XS.

Thanks for any info!