Is the sign for 'foot' the same as 'feet'?
They are very similar! For 'foot' (singular), you typically just point down once toward the specific foot you are talking about. For 'feet' (plural), you point to one foot and then make a small arc to point to the other.
Do I need to bend down to touch my feet?
No, you do not need to bend down. You can perform the sign comfortably from your normal signing space around your torso, simply angling your index finger to point downwards.
How do I sign 'feet' as a unit of measurement?
The sign shown here is for the body part. If you want to sign 'feet' as a measurement (like 'five feet tall'), you would typically fingerspell F-T or use a specific measurement sign, rather than pointing to your toes.