Those look just about right. Yellow squash or zucchini that grow any bigger than a beer bottle aren't much good for anything other than shredding up for baking breads, maybe a horror movie or school science project.
A few of my favorite ways to enjoy fresh garden squash:
1. Cut into 3" pieces lengthwise then quarter into finger-sized wedges. A light drizzle of olive oil, sprinkle of garlic salt, top with parmesan cheese. Wrapped in foil, place on top rack of the grill while cooking the main course, about 15 minutes on moderate heat (300-350F). Serve as a vegetable side dish, still a little crunchy.
2. Cut zucchini or yellow squash (or both) into bite-size chunks, put into a slow-bubbling pot of marinara/red spaghetti sauce for about 15 minutes, then serve as a side dish. Sliced fresh mushrooms and/or bell pepper can also be added, extra flavor and texture. Makes a nice light summer meal served beside a tossed salad with vinaigrette and a squeeze of lemon juice.
3. Thin slices layered into a lasagna. Substitute zucchini, bell pepper, and fresh mushrooms for meat, along with the noodles, cheeses, and marinara for a delicious one-dish meal.