Narrow. Out. Set.

Slide your non-dominant foot straight back one foot-length. Shift your weight onto that foot just enough to step your dominant foot back the same distance and slightly outward. Than shift your weight onto your non-dominant foot just enough to then plant your dominant foot outward. The width and angle of your feet will vary based on your body, but they should be about hip width, flared out about 30 degrees.
Slide step plant
SLIDE STEP PLANT
SLIDE STEP PLANT
Jon Paul Cauchi
3-STEP WALKOUT
3-STEP WALKOUT
WALKOUT MISTAKES
WALKOUT MISTAKES
Kabuki Strength
Once you unrack the bar, take a little step back with one foot, take a little step back with your second foot, and make a small adjustment in the direction your toes are pointed if needed...and then widen out your stance with your third step.
Stronger By Science
The walkout should be achieved in 3 steps maximum and can be achieved in 2. Step back with your off foot, set your dominant foot and then make any repositions of your off foot necessary to find your stance.
I like to use three steps to set-up when squatting. The first step clears you from the rack/J-hooks. And in reality, it may be more of a 1/2 step than a full step.
Robertson Training Systems
One mistake is unracking the bar with a wide foot position. If you unrack the bar with a wide foot position it makes it very hard for you to perform a good walkout when you unrack the bar... you waste a lot of energy and you also don't involve as many muscles as possible... in contrast, when you unrack the bar with a closer foot position... you involve all of your strength... it's much easier to open up when you walk out.
Super Training
You need to become ... deliberate on your walkouts... it should just be step step step ... no extra movement. No turning, no coming up on your toes. Just step step step because anytime you move you're losing energy... Mentally it's going to screw you up, it's also gonna screw you up physically.
...it's literally three half steps. So my first step is going to separate me from the rack, my second step is going to set my foot here, and my third step is simply bringing the other foot into line with that second step. So from here I'm ready to squat.
Super Training
...you're gonna slide your dominant foot back ... until it's in the center of my body - not picking it up... then you pick [your other foot] up and find exactly where this foot would be when you're in your right stance, and then I can just step back with [my first] foot.
I teach people to take three steps on the walkout. The first step is one step to clear the rack and that step is really short. The rule of thumb that I use is that the toes of the back foot should line up with the heels of the front foot. The first step is just to clear the racks and it's straight backwards - not sideways - and it's very short: about one foot length. From there the second step is out into your squat stance and then the third step is out into your squat stance. From there, there should be no more shuffling or movement... over time you should be able to find that pretty instantly.
Jon Paul Cauchi
When you set up under the barbell, squeeze your glutes during your unrack and leg press the bar out of the rack. Then keep your glutes squeezed throughout the walk-out, and make sure they're engaged before you lock your abs tight to take your air and begin your squat. It may take getting used to, but you'll feel a lot more stable and pressure will be taken off your low back...
Hip width + 30 degrees
SQUAT STANCE
SQUAT STANCE
Alan Thrall
TEST WHAT WORKS BEST FOR YOU
TEST WHAT WORKS BEST FOR YOU
For a raw squat, the feet should be set approximately hip-to-shoulder width apart. There are no hard and fast rules here, as everyone’s body (and therefore their squat) will be slightly different. A general rule, however, is that the wider your feet, the more toe flare you need...And if you’re super narrow, the feet are going to be toed out very slightly, if at all... The moderate stance width works incredibly well with a slight degree of toe flare.
Robertson Training Systems
Squat with your heels directly under your shoulders. This creates room for you belly to pass through your legs when you Squat down. It makes breaking parallel easier. If you have long thighs with a short torso like me, your heels should be slightly wider apart than if you have short thighs with a long torso. But your heels should always be about shoulder-width apart when you Squat.
StrongLifts
There's not too many guys that [stand] wide and are proficient. You end up using more hips and not enough quad. I'd like to be a little closer to use more muscle...
Super Training
You want to make sure your feet are adequately flared out, which will help then you want to actively think about driving your knees out in the direction of your toes but not excessively beyond the direction of your toes.
Jeff Nippard
You're going to take a stance where your heels are basically shoulder width or hip width apart and your toes are going to be turned out about 30 degrees. I want your knees to track the same direction as your toes and i want your knees to go out so we we turn our toes out.
Barbell Logic
Most people need a little bit of toe flare and probably somewhere around a shoulder-width stance.