Retiled kitchen, gap between countertop + wall

So we had someone replace the tiles in our existing kitchen, but there is now quite a big gap between the tiled wall + the countertop (big enough for cutlery + food to drop behind the counters) where the new tiles presumably have been thinner.

What would you suggest to fill the gap? Seems too big to silicone, can’t find any tile edging to match and wouldn’t blend with wall tiles well.

any advice appreciated