Squoval
It is a combination of square and oval nail, with a flat tip. If you like to keep you nails short, this it a good shape.
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Coffin/Ballerina
The shape looks like a coffin or a ballerina shoe. This shape is pretty long, but it has a flat tip. You can do this shape with natural nails, but it would be better to use false nails.
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Stiletto
Stiletto has a pointy tip. This shape cannot be maintained with natural nails, since natural nail is not strong enough. It is hard to enjoy this shape in daily life, but it make your fingers look longer.
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