The V4 has a wider toe box area.
Go down half a size from your true size. (ie: I am a true size 9.5, so I buy my 990v4s in a size 9).
As of right now (Q1 2022), the 990v4 retroes do NOT come in wider and narrower sizes. You may be able to find older models in the aftermarket in wider or narrower sizing.
Comfort Factor Ratings:
Cushioning (Softness): 6/10
Stability (Firmness): 6/10
Cushioning to Stability Ratio: 6:6
Midsole Shape (Foot support): 8/10
The 990v4 is one of best shoes you can bless your feet with. The shoe has the perfect combination of cushioning, stability, support, and comfort. It can also be used as a performance running shoe.
The 990v4 utilizes New Balance's signature ENCAP technology. ENCAP utilizes a strong, polyurethane heel cradle with a soft EVA foam core to provide the wearer with the perfect combo of comfort and support. The V4 is not too firm, nor is it too squishy.