The OE seals (91206-965-003, 19x25x3) are discontinued.
These are a single lip, hard seal, meaning the outside diameter is likely metal encased in rubber.
91303-KA3-732, 19x25x4.1 is a suitable replacement.
These are a single lip, soft seal used primary it seems for sealing kickstart levers.
The extra 1mm width is a thin lip on the sealing side of the seal. It can be trimmed off easily by placing the seal upside down in the lever bore, and trimming the edge with a razor. If not, there is a small amount of friction in the action of the lever that wouldn't be there otherwise, as the seal protrudes slightly above the lever's plane so will rub on the washer and frame.