Stripes and plaid and other patterns can be balanced on both sides of a collar by

carefully selecting a coordinating or complementary pattern for the opposite side. This can create a visually appealing and balanced look. Additionally, paying attention to the scale of the patterns is essential. Mixing patterns that are similar in size or selecting one dominant pattern and complementing it with a smaller-scale pattern can help achieve a harmonious balance. It's important to consider color as well, ensuring that the patterns share some common hues or have complementary colors to avoid clashing. Experimenting with different combinations and taking note of what works well together can help achieve a balanced and stylish collar pattern.