We recently replaced our counter tops & installed a new gas range, and lo & behold, we now have discernable gaps on both sides of the stove next to the counter top.
Not finding any solutions I liked online, I remembered the rubber weatherseal I recently used around our doors in our house:
I purchased the above weatherseal at Lowes, but I’m sure any decent home improvement store will have a similar product. The one shown above is a high performance EPDM rubber D-profile weatherseal. You could probably use it ‘as is’ in the gap, but I split it down the middle (split shown in 3rd image above) & only used half of the weatherseal in each gap. I found it in two sizes (1/8″-7/32″ and 3/16″ – 5/16″) and in two colors (white & brown). Here’s what it looks like installed:
I didn’t remove the self-adhesive strip paper. I just gently pressed the weatherseal into the gap for a pressure fit, and it hasn’t moved.