This round box chain comes in 14k yellow gold and has a width of 3.4 millimeters.
Product Details:
Chain Information : 
|  Metal :  | 
 14K Yellow Gold  | 
| Chain Type :  | 
Box | 
| Clasp :  | 
Lobster Clasp | 
| Width :  | 
3.40 mm | 
Approximate Weight:
| Size | 
Weight | 
|      18'' | 
    11.7  grams  | 
|     20''  | 
     12.9  grams  | 
|     22''  | 
     14.1  grams  | 
|     24''  | 
     15.2  grams  |