2.5×0.7 mm (very thin tip) 3.5×1.35 mm (yellow tip) 4.0×1.7 mm (yellow tip) 4.8×1.7 mm 5.5×1.7 mm (common black tip) 5.5×2.1 mm (blue tip) 5.5×2.5 mm 6.3×3.0 mm 7.4×5.0 mm 8.0×5.0 mm 5.5×2.5 mm (larger black tip) Rectangular Lenovo-type tip (~4.0×1.7 mm)