According to Correctional Service Canada National List of Personal Property for Women inmates can have a maximum of 3 Pyjamas

Product details 

• Onesize

• Soft 100 percent cotton knit comes in a lofty medium weight for season-spanning wear

• Oversized cut provides roomy comfort

• Double-stitch trim for durability

• Slim collaret adds feminine flair

• Based on a size XX-Large one size fits up to 3x