Guidewire Sizes

Modern Grinding offers a wide range of guidewire sizes which can all be custom manufactured for your medical device needs. Modern Grinding has manufactured wire which is thinner than the human hair. Our capabilities are from .001" to .150" diameter and everything in between. Just give us a call and find out what we can do for you!

Guidewire sizes can relate to diameter and length but the diameter is the most important. The goal is to find the right guidewire size to fit inside the device you are using (catheter, cannula, introducer needle). The OD of the guidewire, also referred to as the outside diameter, is the maximum diameter of the wire. If a diameter is listed with the guidewire, this is most often the OD. You need to make sure that the OD of the guidewire is LESS THAN the ID (inner diameter) of the device you are using. Guidewire sizes can be listed in inches, millimeters or french. Below is a conversion table from inches to millimeters.

Below is a conversion chart for typical guidewire sizes we manufacture:

Inches (") Millimeters (mm)
0.001 inch guidewire 0.0254 mm guidewire
0.002 inch guidewire 0.0508 mm guidewire
0.003 inch guidewire 0.0762 mm guidewire
0.004 inch guidewire 0.1016 mm guidewire
0.005 inch guidewire 0.127 mm guidewire
0.006 inch guidewire 0.1524 mm guidewire
0.007 inch guidewire 0.1778 mm guidewire
0.008 inch guidewire 0.2032 mm guidewire
0.009 inch guidewire 0.2286 mm guidewire
0.01 inch guidewire 0.254 mm guidewire
0.011 inch guidewire 0.2794 mm guidewire
0.012 inch guidewire 0.3048 mm guidewire
0.013 inch guidewire 0.3302 mm guidewire
0.014 inch guidewire 0.3556 mm guidewire
0.015 inch guidewire 0.381 mm guidewire
0.016 inch guidewire 0.4064 mm guidewire
0.017 inch guidewire 0.4318 mm guidewire
0.018 inch guidewire 0.4572 mm guidewire
0.019 inch guidewire 0.4826 mm guidewire
0.02 inch guidewire 0.508 mm guidewire
0.021 inch guidewire 0.5334 mm guidewire
0.022 inch guidewire 0.5588 mm guidewire
0.023 inch guidewire 0.5842 mm guidewire
0.024 inch guidewire 0.6096 mm guidewire
0.025 inch guidewire 0.635 mm guidewire
0.026 inch guidewire 0.6604 mm guidewire
0.027 inch guidewire 0.6858 mm guidewire
0.028 inch guidewire 0.7112 mm guidewire
0.029 inch guidewire 0.7366 mm guidewire
0.03 inch guidewire 0.762 mm guidewire
0.031 inch guidewire 0.7874 mm guidewire
0.032 inch guidewire 0.8128 mm guidewire
0.033 inch guidewire 0.8382 mm guidewire
0.034 inch guidewire 0.8636 mm guidewire
0.035 inch guidewire 0.889 mm guidewire
0.036 inch guidewire 0.9144 mm guidewire
0.037 inch guidewire 0.9398 mm guidewire
0.038 inch guidewire 0.9652 mm guidewire
0.039 inch guidewire 0.9906 mm guidewire
0.04 inch guidewire 1.016 mm guidewire
0.041 inch guidewire 1.0414 mm guidewire
0.042 inch guidewire 1.0668 mm guidewire
0.043 inch guidewire 1.0922 mm guidewire
0.044 inch guidewire 1.1176 mm guidewire
0.045 inch guidewire 1.143 mm guidewire
0.046 inch guidewire 1.1684 mm guidewire
0.047 inch guidewire 1.1938 mm guidewire
0.048 inch guidewire 1.2192 mm guidewire
0.049 inch guidewire 1.2446 mm guidewire
0.05 inch guidewire 1.27 mm guidewire
0.051 inch guidewire 1.2954 mm guidewire
0.052 inch guidewire 1.3208 mm guidewire
0.053 inch guidewire 1.3462 mm guidewire
0.054 inch guidewire 1.3716 mm guidewire
0.055 inch guidewire 1.397 mm guidewire
0.056 inch guidewire 1.4224 mm guidewire
0.057 inch guidewire 1.4478 mm guidewire
0.059 inch guidewire 1.4986 mm guidewire
0.06 inch guidewire 1.524 mm guidewire

Quote Your Next Project

  • Guidewires, Mandrels, Core Wires
  • K-Wires, Steinmann Pins, Needles
  • Coils, Springs, Orthopedic Pins
  • Custom Medical Wire Prototypes



In the News

Check out Modern Grinding in a recent issue of Micro Manufacturing for a feature article about our micro manufacturing capabilities.




Also, our very own Jim Boldig was recognized as a Top 30 under 30 Medtech Innovator by Qmed.