https://helpforum.sky.com/t5/Broadband/Fibre-Cable-size/m-p/5224258#M554726 <P><a href="https://helpforum.sky.com/t5/user/viewprofilepage/user-id/4630533">@Boogie2</a>&nbsp;the pigtail cable Openreach use is quite thin around 2 -3mm in diameter st a guess. But note the.installation engineer will want to drill the access hole and fit a plastic firment that protects the cable and weather proofs the hole.&nbsp;</P> Wed, 04 Mar 2026 18:52:05 GMT Chrisee 2026-03-04T18:52:05Z https://helpforum.sky.com/t5/Broadband/Fibre-Cable-size/m-p/5224203#M554716 <P>What is the diameter of new Sky Broadband Fibre cable into house?</P> Wed, 04 Mar 2026 17:49:27 GMT https://helpforum.sky.com/t5/Broadband/Fibre-Cable-size/m-p/5224203#M554716 Boogie2 2026-03-04T17:49:27Z https://helpforum.sky.com/t5/Broadband/Fibre-Cable-size/m-p/5224221#M554718 <P><a href="https://helpforum.sky.com/t5/user/viewprofilepage/user-id/4630533">@Boogie2</a>&nbsp;Varying sizes so all depends on the one you are talking about! External with all the protection is about 6mm.</P><P>&nbsp;</P><P><A href="https://www.openreach.com/help-and-support/how-is-full-fibre-installed" target="_blank">How is Full Fibre Installed? Openreach</A></P> Wed, 04 Mar 2026 18:13:06 GMT https://helpforum.sky.com/t5/Broadband/Fibre-Cable-size/m-p/5224221#M554718 JimM1 2026-03-04T18:13:06Z https://helpforum.sky.com/t5/Broadband/Fibre-Cable-size/m-p/5224258#M554726 <P><a href="https://helpforum.sky.com/t5/user/viewprofilepage/user-id/4630533">@Boogie2</a>&nbsp;the pigtail cable Openreach use is quite thin around 2 -3mm in diameter st a guess. But note the.installation engineer will want to drill the access hole and fit a plastic firment that protects the cable and weather proofs the hole.&nbsp;</P> Wed, 04 Mar 2026 18:52:05 GMT https://helpforum.sky.com/t5/Broadband/Fibre-Cable-size/m-p/5224258#M554726 Chrisee 2026-03-04T18:52:05Z