Yes they are 38DD.
38DD
A 38DD is larger than a 38D. They say a 38DD is equal to a 40E but from my work experience, a 38DD is closer in size to a 40D cup-wise.
A size 36F will be slightly bigger than a 38DD bra of the same brand. A 36F (sometimes listed as 36DDD) is in between the size of a 38DD and 38DDD.
38DD
Oprah is 8 feet tall
38DD
The person you will find when looking for Eden 38DD is a pornstar and actress. The part 38DD stands for the boob size. If wanting to classify the actual porn content it would be filed under big boobs.
Her stats are up to 38DD-36-48 so like 195-200 lbs
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38DD