1. Please handle the fruit.
Most lemons are Eurekas or Lisbons. Eurekas have somewhat thicker rinds, but regardless of variety, look for a lemon that feels heavy in the hand and which, gently squeezed, gives nicely and doesn’t seem to have a thick, hard rind (less juice inside). Lemons turn from green to yellow because of temperature changes, not ripeness, so green patches are OK, but avoid those with brown spots, which indicate rot.