How best to deal with this gap between floor tiles and wall tiles?

The tiles were slightly not wide enough to the cover the entire area of the bathroom floor. Does anyone have any good ideas how to fill this gap / make it look good? The gap is 2.0 - 2.5 cm for about 0.9m. The two ideas I have are grout it or use thin slivers of tile but don’t think either would look good.

The tiles were slightly not wide enough to the cover the entire area of the bathroom floor. Does anyone have any good ideas how to fill this gap / make it look good? The gap is 2.0 - 2.5 cm for about 0.9m. The two ideas I have are grout it or use thin slivers of tile but don’t think either would look good.

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