WE HAVE 25G 5/8 INCH ALSO BUT WHEN I READ THE POST IT MADE ME GO AND LOOK TO SEE WHAT SIZE WE HAVE AND WHAT SIZE WAS I GIVEN YESTERDAY WHEN I WENT TO THE PHARMACY AND THEY GAVE ME 26G 5/8 INCH BUT WE HAVE ONLY USED IT ONCE AND WE USED THE 25G AND IT WORKED VERY WELL