Square Off

both sides and head of a nail are straight and slightly rounded off
cut straight both sides and head of a nail and round off each angle
this shape is the most popular one and good for those whose nails are weak

Square

the head and both sides of a nail cross at right angles
cut straight the head and both sides of a nail
you need to be careful, as the nails in this shape are fragile
this shape is suitable for toenails

Point

the head of a nail is pointed and both sides are rounded off
trim the both sides of a nail sharply and file the head slightly
you need to be careful, as the nails in this shape are fragile

Oval

the nail in this shape looks an egg
file your nail in an oval from the both sides to the head
this shape is stable as the length of nails is almost same