The Dutch Heel is a very straightforward heel with no bells or whistles. It's a good general-use heel as it fits most feet just fine.
However, if you aren't entirely sure of someone's size, or if you realize that you forgot to subtract a bit (10%) of your calculated cast on*, you may want to try a German or Welsh heel instead.
*subtracting 10% gives you a slightly snugger fit without compromising comfort. If you knit exactly the precise number of stitches per your gauge to fit the measurement of the foot you're knitting for, you're likely to get a saggy sock.