dome light won't fit

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i purchased a set of sylvania DE3175 bulbs to replace the dome light in my 07 sedan. checked yarisworld for the proper size and confirmed with my local auto parts store at time of puchase. however, the new bulb seems a little bigger than the original one and i couldn't seem to squeeze it in there without fear of breaking it.

am i using the wrong bulb or is there a trick to get it to fit? i've searched the site and most of the info i'm finding is regarding aftermarket led bulbs and i'm not really interested in those. the DE3175 seems a little bit longer and the wedge on each end seems thicker. thanks!