The phrase "a bit bulky" is correct and usable in written English.
It can be used to describe something that is somewhat large or heavy, often in a way that suggests it may be cumbersome or inconvenient.
Example: "The new laptop is a bit bulky, making it less portable than I had hoped."
Alternatives: "somewhat heavy" or "a little cumbersome."
Most of them are a bit bulky around the ear, as you could probably guess.
Though the gloves are a bit bulky, I could still operate turn signals and smaller controls with some effort.
E-paper Apple's iPad and Amazon's Kindle are a bit bulky, but lots of news organisations think they are just the ticket for electronic reading.
At 2,408 pages and three and a half pounds, it's a bit bulky for the beach, or even the lap.
But if the knitwear looked a bit bulky, and if the black velvet pieces bursting with gold flower embroidery seemed dated, they didn't distract from what mattered most in this collection: those covetable coats.
Though neither is a looker — they are a bit bulky in your pocket — and they are noticeably slower than more expensive phones, I found each quite handy for Web surfing and e-mail.
It's a bit bulkier and almost twice as heavy (400g v 213g), but it has more storage (16GB v 2GB), a bigger colour screen (7in v 6in), and multimedia features the Paperwhite lacks.
To be honest, the phone is a bit bulkier than most of its competition but I see this as a good thing.
It's a bit bulkier than the Big Jambox and similar alternatives, but those who appreciate good sound will forgive it the added girth.
It has the same slide-out keyboard, but no external antenna and a bit bulkier styling, but the guts are just about the same.
Of course it also means the plug is a bit bulkier than a lot of the other phone adapters — and that you won't be able to take advantage of the quick top-up when the adapter isn't handy.
