Shin guards, Molten, S/M (name written on them), shin pads, soccer, kids, leg guards

These are Molten Swan Shin Guards (shin protectors).

I purchased size S when my child was in the lower grades of elementary school and washed them each time they were used. They were used when my child was between 110-140 cm tall. They felt very hygienic.
They are comfortable to wear, not painful, and very easy to care for as they can be washed whole.

I also purchased size M for when my child grew, and I stamped a name (approx. 2mm x 15mm) on them. However, my child quit soccer before outgrowing them, so they are unused. The sales bag has been replaced with the one for size S, but the contents are size M.

I believe the name can be removed, but I will leave it as is. The name on the size S pair disappeared with use.

These are stored at home. Please understand.
If you are unsure about the size, how about purchasing them as a set of two?
Recycled packaging may be used.
Thank you for your consideration.