Please see the chart below for the track pants sizes. Note that the red striped track pants are slightly larger than the blue.
See this link for the direct resource page on the Hillsong Store:
Y&F Blue Stripe Track Pants: https://hillsongstore.com/y-f-blue-stripe-track-pants/
Y&F Red Stripe Track Pants: https://hillsongstore.com/y-f-red-stripe-track-pants/