Your writing size is an interesting feature and can tell graphologists a lot about the confidence we have in ourselves.
Large handwriting, particularly that which is well spaced with large loops indicates an outgoing, bubbly personality; someone who exudes self-confidence. People with large handwriting tend to have the ability to ad lib, willing to take risks when required to make decisions.
If your handwriting is smaller, you might want to be more measured in your decisions and, rather than take risks, base your judgements on information and facts.