help sizing skinny jean type pants for 23 &1/2 inch & 31 " Virginia Turner doll

[from1981]

  I need help sizing skinny jean type pants for my Twin 31" Virginia Turner Sages & my new 23 & 1/2 inch Virginia Turner doll. I've had the twin Sages for over 5 years but want to change their pants & need to buy clothes for the new doll & it's been years since my 18 year old & 21 year old were little, so I'd appreciate any help from someone who knows about children's sizes as the Sages wear about a 4t in shorts, but idk about the 23 &1/2 inch doll because I just got him. thanks for any help.