I brought hank a mini shetland size harness and I was glad it was leather as I had to have the saddle/girth, back strap and bridle adjusted to fit him properly
That's really interesting Ruskii, it sounds as though he might be a similar shape to Ziggy! Obviously off the shelf harness is not the way forward, alas.Totally normal to all be different sizes ! My horse is a full size normally but the harness !!! Welllll ........he's a cob size bridle, PONY size back band, full size breeching and just fits into a full size collar and his bit I had made specifically for him, and my set is from a well known and trusted harness maker, the price was eye watering but I brought it brand new and it would do easily for competitions as well as pleasure driving.
The offer is there again if you want a visit .................