A 5.25-inch to 6-inch vintage Royal Doulton full-body Winston Churchill toby jug generally values between $40 and $65 in excellent, damage-free condition.

Because these were mass-produced over a span of decades starting in 1940, secondary market prices are highly dependent on the venue and exact buyer interest: 

• Online Marketplaces: On platforms like eBay or Mercari, they routinely trade between $45 and $55.

• Specialty Retailers: Antiques shops and replacement services like Ruby Lane list them closer to $65