Q.Why Are My Squash Growing Small
I’m growing squash in my garden. They are about 10 to 12 small squash on my plant, but they are only growing about 4 inches and they are very skinny. Could this be due to pollination? I’ve started getting up in the morning and hand pollinating my squash to see if they grow any bigger. . . . Please help.

Certified GKH Gardening Expert
Poor pollination is likely the cause. Hand pollination can help as well as taking steps to attract more pollinators. These articles may also help you:
https://www.gardeningknowhow.com/garden-how-to/beneficial/insect-pollination-process.htm
https://www.gardeningknowhow.com/garden-how-to/beneficial/creating-a-pollinator-garden.htm