My nose is big length wise. 6 cm long and 4 cm sticking out. Can I make it smaller?

If you post or send some photos, we can make some digital images, and also give useful advice about what kinds of changes are possible.You should understand that making very large changes in a nose require advanced techniques, techniques that most plastic surgeons cannot handle. Be sure to read the section in the "Web reference" link on how to stay out of trouble while searching for a rhinoplasty surgeon.

Rhinoplasty, is one of the most common plastic surgery
procedures performed today. Often, the structure or size of the nose is not
proportionate with the other features on the face. Nose reshaping procedures
can help to correct the disproportionate appearance of the nose by altering the
size or shape of the nose, the span of the nostrils, or the angle between the
nose and the upper lip.

In addition, nose reshaping procedures may be performed to
correct a nasal birth defect or injury as well as chronic breathing problems.
An open Rhinoplasty procedure may last approximately two to four hours.

As with any surgical procedure, you will likely experience
some pain, bruising, and swelling, particularly in the upper portion of your
face and around your eyes. Depending on your rate of recovery, the bruising will
begin to fade and you will be able to return to work within seven to ten days
following your procedure.