A shoe can fit with thin socks yet feel much tighter with your usual combination. If you use particular insoles or thicker socks, bring them to the fitting. Available internal space is part of fit. Suitable length alone does not establish whether there is enough room around the instep, heel and toes.
First check whether the existing footbed is intended to be removed and whether the shoe suits the planned combination. Do not stack several insoles without checking. For professionally fitted or prescribed insoles, follow the relevant practitioner's guidance and ask about a new shoe model where necessary.
Test both shoes in the complete arrangement
Wear both shoes with the intended socks and insoles. Fasten the laces or closures as you would in normal use. Walk on the appropriate fitting surface and notice slipping, pressure and heel retention. An unusually tight fastening should not be necessary to compensate for an unsuitable basic shape.
Check that the insole lies properly rather than curling or bending. Do not cut a new accessory speculatively when its instructions or individual fitting requirements say otherwise. Ask before purchase which adjustments and combinations are appropriate. This prevents a seemingly straightforward shoe order from becoming an uncertain series of modifications.
Compare complete costs. If a shoe requires an additional accessory to be comfortable, include it in the price. That does not automatically make the purchase wrong; it makes comparison with another suitable model more accurate. Equally, do not replace existing appropriate insoles with a new set without a reason.
After a successful fitting, note the exact model and combination used. That information is more helpful than size alone when ordering again. If discomfort persists or individual provision is needed, seek appropriate professional assistance. A blanket recommendation to add more cushioning cannot reliably resolve an unsuitable combination. The purchasing aim is to identify a shoe that accommodates the setup you actually need, rather than repeatedly altering an ill-fitting choice after the return or fitting decision has already been made.
