A custom leather notebook is a wholesale-ready notebook or journal with a leather (or leather-like) cover, tailored by size (A6/A5/B5), paper (usually 80–120 gsm), binding (Smyth sewn, Wire-O, Perfect, or refillable), and branding (emboss, deboss, foil). For B2B buyers, match material to brand tier, pick paper for ink behavior, choose a binding for durability vs. cost, and select a finish that fits your logo style and lead-time.