How to read XL plug measurements
Match widest insertable diameter, length and external base dimensions.
Treat XL as a variant name
Start with the selected option, then find the labeled diameter and insertable length. Overall dimensions can include the base. If a listing shows circumference, compare it only with another circumference or convert it to estimated diameter for a circular section.
Compare two labeled figures
The Rockin XL lists 1.61 inches of insertable diameter and 3.5 inches of insertable length. The Anal Adventures XL diagram shows 2 inches of body width and 4.5 inches of insertable length. The b-Vibe XL lists 2.2 inches of diameter and 5.6 inches of insertable size separately from the neck. See the b-Vibe size chart.
Record the base separately
Check the external base shape and span. Choose an appropriate flared external base designed to stay outside, and confirm its dimensions independently. For a smaller measured comparison, see the compact plug guide.