This lawn mower from Bosch has a cutting width of 37 cm, great for more precise cutting.
From ManoMano
Easyrotak 36-550 n 36v Rotary mower - Bosch
Conrad Electronic
Bosch Home and Garden EasyRotak 36-550 (Baretool) Rechargeable battery Lawn mower w/o battery, w/o charger Cutting width (max.) 38 cm