So here is a rough guide to each style:
From shoulder to shoulder this style is slightly curved and sits on the collarbone. Great for those brides with a larger bust who wishes to minimize attention to the bust area.
High neck - speaks for itself
Off the Shoulder - This style sits below the shoulders and has little sleeves that cover part of the upper arms. Always make sure you test this style out as movement can be a little restrictive.
Another example of a slightly shorter dress with a Bateau neckline
Another example of a beautiful dress with square neck