Standard baskets are the right call for the majority of resort skiers. These compact discs (typically 40-50mm across) are low-profile and lightweight, making them ideal for groomed runs, hardpack, and general all-mountain skiing. They won't catch on gates, tree branches, or moguls, and their minimal air resistance is a bonus if you're into racing.
The trade-off is that standard baskets will punch right through deep powder, leaving your pole sunk to the grip—which is both frustrating and potentially unsafe when you need a solid plant. If you regularly chase fresh snow off-piste or venture into the backcountry, you'll want larger powder baskets instead.
For most skiers who spend 80% or more of their time on-piste, standard baskets are all you need. You can always swap to powder baskets later if your skiing evolves.