Packaging design guide — gift box, sleeve, mailer best practices

3 packaging tiers: (1) Standard mailer: kraft padded envelope, $0.50-1.50/unit, OK for 1-3 small items. (2) Branded gift box: 200-300gsm cardboard, custom-printed logo + design, $3-8/unit, premium feel. (3) Premium rigid box: 1200gsm rigid, magnetic closure, foil stamping, $12-30/unit, luxury impression. Branded sleeves over neutral mailer: $1-3/unit, hybrid economy + brand. Sustainable: kraft brown FSC, water-based inks, no plastic windows, biodegradable tape (Kraft Tape). Custom die-cut + emboss adds $1-3/unit but elevates perception 2-3x.