With bucket-sized soft drinks, bagels the size of baseballs, and burgers that you can barely get your mouth around, it's no wonder that, according to the CDC, one-third of adult Americans are currently obese. In the last 20 years portions have been ballooning — and we've been getting bigger right along with them. From 1980 to 2008, obesity rates doubled for adults and tripled for children.

Thanks to the National Heart, Blood and Lung Institute (part of the National Institutes of Health), we can take a peek back at what portions looked like 20 years ago and compare that to what they look like now. Hint? They've gotten a lot, lot bigger. (via DivineCaroline.com)

Portion Sizes 20 Years Ago and Today

bagels then and now
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Bagels

Then: 3-inch diameter, 140 calories Now: 6-inch diameter, 350 calories

Burgers then and now
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Fast Food Cheeseburgers

Then: 333 calories Now: 590 Calories

More from Delish: Healthy Fast Food Alternatives

Spaghetti and Meatballs
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Spaghetti and Meatballs

Then: 1 cup of spaghetti and sauce with 3 meatballs, 500 calories Now: 2 cups of pasta and sauce with 3 meatballs, 1,025 calories

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Soda
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Soda

Then: 6.5 ounces, 85 calories Now: 20 ounces, 250 calories

blueberry muffin
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Blueberry Muffin

Then: 1.5 ounces, 210 calories Now: 5 ounces, 500 calories

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french fries
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French Fries

Then: 2.4 ounces, 210 calories Now: 6.9 ounces, 610 calories