Quick answer: Our compression socks use two sizing systems. Lettered packs such as the 6 Pack Copper Compression Socks run S, M, L and XL against an inch-based size chart on the product page. Combined sizes map to shoe size: S/M fits women’s 6-9.5 or men’s 5-9.5 in our plantar fasciitis pair, and one sports pack adds XXL.
A compression sock only does what its listing promises if it actually fits, and sizing is the step people rush. This guide collects the real size options from our product pages — no generic charts, just what each listing offers and publishes — so you can order the right size the first time.
Two sizing systems in our range
Most of our multi-packs use four lettered sizes, S through XL, each backed by a size chart in inches on its product page. A second group uses combined sizes — S/M and L/XL — and two of those listings publish direct shoe-size mappings, which makes them the easiest products to size from memory. One product, the Running & Sports 4-pack, adds an XXL option on top.
Shoe-size mappings our listings publish
| Pain Relief Compression Socks for Plantar Fasciitis | Unisex. S/M fits women’s shoe sizes 6–9.5 and men’s 5–9.5; L/XL fits women’s 10–13.5 and men’s 10–12.5. |
|---|---|
| 3 Pairs Compression Socks For Men | S/M covers men’s shoe sizes 6.5–9; L/XL covers men’s 9–12. |
Size options at a glance
| 6 Pack Copper Compression Socks | S, M, L, XL — size chart in inches on the product page. Ten color combos. |
|---|---|
| 3 Pairs Neuropathy Compression Socks | S, M, L, XL, sold in separate Men and Women versions. |
| Copper-Infused Compression Socks (5-Pack) | Two combined sizes: Small–Medium and Large–XL, in six colors. |
| Running & Sports Compression Socks — Pack of 4 | S/M, L/XL and XXL — the only best seller with an XXL option. |
| Cushioned Running Anti Blister 6 Pairs Socks | S, M, L, XL — size chart in inches on the product page. |
| High Arch Support Insoles | Numbered sizes 4 through 13, with separate Men and Women options. |
How to get the size right
- Use each product’s own chart. The inch-based charts sit on the individual product pages and are specific to that product — do not reuse a chart from one pack for another.
- Anchor on a shoe size where offered. The two mappings above are the only ones our listings publish; for everything else, measure and compare in inches.
- Unsure between two sizes? Email info@plantarsocks.com before ordering rather than guessing.
- If the size misses, our 30-day return policy covers unworn, unused items with tags in original packaging.
Frequently asked questions
What sizes do the copper compression sock packs come in?
Both the 6 Pack and the 6 Pairs Copper Compression Socks come in S, M, L and XL, each with an inch-based size chart on its product page. The Copper-Infused 5-Pack instead uses two combined sizes, Small-Medium and Large-XL.
How do S/M and L/XL map to shoe sizes?
For the Pain Relief Compression Socks for Plantar Fasciitis, S/M fits women's shoe sizes 6-9.5 and men's 5-9.5, while L/XL fits women's 10-13.5 and men's 10-12.5. For the 3 Pairs Compression Socks For Men, S/M covers men's 6.5-9 and L/XL covers men's 9-12.
Is there an XXL compression sock option?
Yes. The Running and Sports Compression Socks 4-pack offers S/M, L/XL and XXL. It is the only product among our best sellers with an XXL option, so start there if the combined sizes elsewhere run too small for you.
Are your compression socks unisex?
It varies by product. The plantar fasciitis pair is described as unisex with separate women's and men's shoe-size mappings, the neuropathy socks are sold in Men and Women versions, and the 3 Pairs Compression Socks For Men are sized on men's shoe sizes.
What if I order the wrong size?
We have a 30-day return policy, which means you have 30 days after receiving your item to request a return. Items must be unworn and unused, with tags and in the original packaging. Email info@plantarsocks.com to start a return.
More sock guides
- Our best-selling compression socks of 2026 — ranked by real orders
- Copper compression socks — guide to our No. 1 seller
- How to choose a compression level — what our listings state
- How to wash and care for compression socks
This article is general information, not medical advice — talk to a healthcare professional about your specific needs.
Prices and specifications are current as of publication and may change. See the product page for the latest details.