The wire is available in a variety of gauges ranging from 22g to 32g - 22g is the thickest gauge and can be used for trees and bushes or for thick stems such as sunflowers, 24g, 26g and 28g are used for 12th scale flowers again depending on the width of the flower stem. 28g I would use for tiny stemmed 12th scale flowers and 30g and 32g I would use for all smaller scale flower and leaf stems - Please put a note regarding the wire gauge you would like on your order form - thank you.