Which positioning indicates that the crutches are sized correctly?
1) Arms fully extended, crutch top rubbing under the axilla
2) Arms flexed 30 degrees, crutch top 3 finger-widths from axilla
3) Arms flexed 60 degrees, crutch top 2 to 4 inches from axilla
4) Arms flexed 90 degrees, crutch top 3 inches from axilla