Assuming the size of the extreme is the same as the original [words=https://officialhydromaxpump.com/?uid=6&oid=2&affid=98 ]x40[/words]. Here are the inside circumferences, all taken with no pump sleeves.
The [words=https://officialhydromaxpump.com/?uid=6&oid=2&affid=98 ]X40[/words] and [words=https://officialhydromaxpump.com/?uid=6&oid=2&affid=98 ]X40[/words] measurements were taken with the [words=https://officialhydromaxpump.com/?uid=6&oid=2&affid=98 ]comfort pad[/words] on
The [words=https://officialhydromaxpump.com/?uid=6&oid=2&affid=98 ]herc[/words] is roughly 6.4inches
The [words=https://officialhydromaxpump.com/?uid=6&oid=2&affid=98 ]x40[/words] is roughly 6.75
The [words=https://officialhydromaxpump.com/?uid=6&oid=2&affid=98 ]x40[/words] is roughly 8
The [words=https://officialhydromaxpump.com/?uid=6&oid=2&affid=98]penomet[/words] is just shy of 7.75inches
The [words=https://officialhydromaxpump.com/?uid=6&oid=2&affid=98 ]X40[/words] and [words=https://officialhydromaxpump.com/?uid=6&oid=2&affid=98 ]X40[/words] measurements were taken with the [words=https://officialhydromaxpump.com/?uid=6&oid=2&affid=98 ]comfort pad[/words] on
The [words=https://officialhydromaxpump.com/?uid=6&oid=2&affid=98 ]herc[/words] is roughly 6.4inches
The [words=https://officialhydromaxpump.com/?uid=6&oid=2&affid=98 ]x40[/words] is roughly 6.75
The [words=https://officialhydromaxpump.com/?uid=6&oid=2&affid=98 ]x40[/words] is roughly 8
The [words=https://officialhydromaxpump.com/?uid=6&oid=2&affid=98]penomet[/words] is just shy of 7.75inches