Frankly speaking, it’s always hard to tall when you’re in clothes. They can hide a lot.
However, what I found immensely useful is this article (was posted by someone earlier on the forum):
http://rsos.royalsocietypublishing.org/content/5/5/171790It provides very useful information for proportions, saying what ratios are normal (i.e. lying within 3 standard deviations). As for results, the article says arm length does NOT matter and does NOT affect your attractiveness if certain ratio lies within 3 SD. In other words, -3 SD and +3 SD, though clearly distinguishable when models are directly compared, in real life are unnoticed. You will consider these arms normal.
If we’re talking about leg length, 0-0.5 SD is considered to be the most attractive. It’s the most important factor, in fact, in terms of attractiveness.
My advice thus is to measure, using techniques from the article, your proportions and look at the results. It’s the safest method, actually, to check it all out.
P.S. What’s your sitting height?