Which LDFAS bands fit the IWC Big Pilot 46mm?

Yes. LDFAS lists 1 compatible band for the IWC Big Pilot 46mm: LDFAS 22mm Quick Release Titanium Watch Band - 3-Link Bracelet with Hidden Clasp.

What band size does the IWC Big Pilot 46mm use?

The IWC Big Pilot 46mm has a 46mm case. Compatible band width: Quick Release 22mm. Big Pilot IW501001 (46mm) uses 22mm lugs.

Yes — 1 LDFAS band are available for the IWC Big Pilot 46mm, each covered by a 2-year warranty.

IWC46mmLug Quick Release 22mmBig Pilot

Big Pilot IW501001 (46mm) uses 22mm lugs.

Grade 1 Pure Titanium (99.5%+) — aerospace-grade, feather-light and skin-friendly.
Precision fit — engineered to the exact lug geometry of your watch.
2-year warranty on every LDFAS band.

Which LDFAS bands fit the IWC Big Pilot 46mm?: Yes. LDFAS lists 1 compatible band for the IWC Big Pilot 46mm: LDFAS 22mm Quick Release Titanium Watch Band - 3-Link Bracelet with Hidden Clasp.
What band size does the IWC Big Pilot 46mm use?: The IWC Big Pilot 46mm has a 46mm case. Compatible band width: Quick Release 22mm. Big Pilot IW501001 (46mm) uses 22mm lugs.
Are LDFAS bands compatible with the IWC Big Pilot 46mm?: Yes — 1 LDFAS band are available for the IWC Big Pilot 46mm, each covered by a 2-year warranty.