Labrador Retrievers can differ substantially in height, chest width, body condition, and preferred resting posture. That variation makes a breed-only fit promise unreliable. Use the dog in front of you and the latest published product data.
Start with body width and resting length.
Measure the widest relaxed point and chest-to-tail-base length without compressing the coat or forcing a posture. Note whether the Labrador sits upright, leans, curls, or lies long during a real rest break.
Rehearse a calm entry plan.
A Labrador that steps in confidently creates a different handling routine from one that needs rear support or lifting. Check the entry height, handler position, available space, and the dog's current ability before treating the stroller as usable.
Check wet-day ownership.
Labs often join muddy or wet outings. Review cleanable contact surfaces, wheel inspection, drying, and storage before buying. A mobility product earns its place when the family can clean and prepare it for the next trip without delay.