Size the problem honestly: this is a powerful dog
A German Shepherd is a large, athletic dog with a deep chest, a strong neck, and the ability to generate serious force in a single lunge at a squirrel, a cyclist, or another dog. Equipment that would be perfectly adequate on a spaniel — thin webbing, plastic clips, a single adjustment point — becomes the weakest link with this breed. The gear has to do two jobs at once: give the handler mechanical help in controlling that strength without injuring the dog, and survive being the thing between a determined Shepherd and whatever he has decided to reach.
Dual-clip harnesses give you options as training progresses
A harness with both a back clip and a front chest clip is the most versatile answer. The front clip changes the physics of pulling: when the dog surges, the lead's angle turns his chest toward you, draining the lunge of its power without any pressure on the throat, which makes it the right setting for a young, reactive, or still-training Shepherd. The back clip suits settled walking, tracking-style work, and long lines where the dog is meant to move freely ahead. Look for wide, padded straps that will not cut into the chest on a surge, metal buckles and D-rings rather than plastic, and stitching you would trust at full load — then inspect that hardware regularly, because wear shows up here first.
Fit for a deep chest and a huge shoulder stride
The Shepherd's reach comes from the shoulder, so the girth strap must sit several fingers behind the front legs and the front design must leave the shoulder blades entirely uncovered — a strap crossing them shortens the stride and rubs a dog who covers ground all day. With adjustment at the neck, chest, and girth, fit the harness on the standing dog, then watch him trot: it should not rotate when he turns, ride up into the armpits, or shift the coat in patches that signal friction. Re-fit through growth and through the coat changes of the seasons, since a winter Shepherd in full coat measures differently from the same dog in summer.
The collar's role: ID, backup, and close control
Keep a sturdy flat collar on the dog alongside the harness. It carries his identification at all times — including at home, where no harness is worn — and it gives anyone who needs to hold the dog briefly a secure, familiar point of contact that is not a handful of loose neck skin. Fit it to two fingers, choose hardware as seriously as the harness's, and never use choke or prong designs as a substitute for training: with a breed this strong and this sensitive to its handler, control built on discomfort damages the working relationship the breed is famous for.
Identification for a dog who can cover serious ground
A German Shepherd who gets loose can travel — fit, driven, and capable of clearing obstacles that stop smaller dogs — so a finder may meet him streets or fields away from home, without any local knowledge of where he belongs. His collar needs to speak for him at that distance. Through KinsLe's Verified QR ID Pet Profiles, that collar carries a unique QR code, and whoever catches him can scan it to reach his profile and your contact details on the spot, shortening the gap between found and home.