According to the search results, there are different ways to convert US jeans sizes to waist measurements. Here are some possible answers:

• Size 33 in US womens jeans typically corresponds to a waist measurement of around 33.5-34.5 inches.
• A jean with a 34-inch waist approximately corresponds to a US size 20 or XL size.
• The waist measurement for size 33 in US womens jeans is not explicitly given in the search results, but it can be estimated to be around 33-34 inches based on the other size conversions provided.

Its worth noting that different brands may have slightly different size charts, so its always a good idea to check the specific brands size chart before making a purchase.