Do you mean sides? That's 8. If you mean sizes, as you spelled it, then a given octagon has only one size, but the shape generally referred to as an "octagon" can have an infinite number of sizes.
It has infinitely many sizes.
Regular octagons have equal sides.
An octagon has eight sides.
An Octagon has 8 sides
An octagon has 8 angles.An octagon has 8 angles.An octagon has 8 angles.An octagon has 8 angles.
It has infinitely many sizes.
An octagon is a plan figure with eight sizes, a regular octagon is an octagon with all the eight sizes being equal to each other
An infinite number of sizes. Start off with any octagon. Multiply each of its sides by any number x (>0). That will give a similar octagon that is x times as large. The number of such octagons then is equal to the number of possible values for x, ie infinite.
It is an irregular 8 sided octagon
An octagon is a polygon with eight sides.
Regular octagons have equal sides.
An octagon has 8 sides.
An octagon has 8 vertices.
An octagon has 8 vertices.
An octagon has 8 edges
there are three rhombuses in an octagon.
An octagon has eight sides.