Tbh, these days 'hourglass shape' often means a slim frame but with a butt and big boobs - people don't seem to care about actual hip/waist ratio and shoulder width. Scarlett Johansson is not an hourglass - she's an apple. She clearly gains weight on her upper body - boobs, arms, stomach. She has quite narrow hips and usually slim thighs. People just think she's an hourglass because of her boobs.
Jennifer Lopez is a pear shape.
Candice Swanepoel is an hourglass, but I know some women gets upset by that because they want to 'claim' the hourglass as something belonging to bigger shapes. You can be an hourglass at many sizes, it's about proportions. Many modern 'hourglasses' are also pear shaped women with implants. A "perfect" natural hourglass with slim thighs and a flat stomach and long legs occurs VERY rarely because the beauty ideal is caught somewhere between men's preferences and the gay man's designer ideal.