It depends on how densely staffed the store is, and I'll give you fair warning that there will likely be periods where you will get less hours than you want if you're full time, due to varying customer traffic and store needs. But if you have full availability and the store needs it, you could get up to 40 a week. At my old store (medium-high volume), most fulltimers get between 30-40 a week, averaging around 36. But during slow periods (especially January-February during the post-holiday slow period), they could get as few as 25 hours a week. So just know that and keep it in mind. Due to company policies and needs, your manager generally doesn't have much wiggle room in terms of scheduling more hours during a tight week, so you're shit out of luck if hours are short.