Straps for 44mm PAMs generally accept straps that are 24mm lug size. The dimensions of such straps come either in 24/22 or 24/24... meaning the buckle size can either be 22mm or 24mm.
Most post-V OEM straps from Panerai, along with the rep straps that come our rep PAMs, are usually 24/22. Therefore, most 'Panerai' signed deployment or tang buckles are 22mm. Some of us, however, prefer pre-V strap dimension 24/24, with wider buckle at 24mm. There are only tang buckles available at 24mm though. No deployment for 24mm unless it is aftermarket.