They look like snowflakes, or Leucojum to me (are there little green markings on the edges of the flowers perhaps?). Snowdrops are Galanthus; snowflakes are Leucojum…and bigger. I have some blooming right now in the garden, but at around 2 feet tall…not 3 or 4! So that throws me off…but they certainly look like Leucojum. Welcome, Renee, nice to see you.