Vacu-Tech - How to Measure your Penis for a Flared Cylinder

Flared Cylinder Size
How to Determine your Flared Cylinder Size

Measure your penis using the instructions below to pick a cylinder size from our conversion chart. With a correct measurement, we will manufacture a cylinder that fits properly and provides maximum expansion and comfort.

1. Wrap a string around the ERECT shaft
near the base.

2. Mark where the string overlaps itself with a pen (see blue arrow).

3. Lay string flat and measure the distance between the two marks with a ruler.

This ruler image is an example only. Do NOT use this onscreen image to measure. Use your ruler.

If Your Measurement is:	Order This Flared Cylinder Size:
3" to 3 ½"	1 ¼" x 9"
3 ¾" to 4"	1 ½" x 9"
4 ¼" to 4 ¾"	1 ¾" x 9"
5" to 5 ¾"	2" x 9" (most popular)
6" to 6 ¾"	2 ¼" x 9"
7" to 7 ½"	2 ½" x 9"
7 ¾" to 8 ¼"	2 ¾" x 9"
If your measurement is not listed here - Please Contact Us

NOTE: Be sure to use string to measure circumference. A tailors tape or flexible ruler will not provide
accurate measurements. Standard cylinder length is 9 Inches. Please measure accurately as cylinders
cannot be returned or exchanged for health reasons.

ThickWall Cylinders
Click here to determine your correct ThickWall Cylinder size.

Cylinders for Penis & Scrotum
We have a variety of sizes to fit your needs! For more information
call our Customer Service line at 1-650-738-9500.

Please measure accurately as cylinders cannot
be returned or exchanged for health reasons.