If you're looking for the best women birthday gift ideas to say happy 40th birthday, look no further! This elegant sterling silver necklace of four silver decade circles is the perfect way to celebrate an awesome lady! 4 interlocking rings for 4 wonderful decades. A wonderful gift to celebrate a 40th birthday! • Free standard shipping (upgrades at checkout) • Ships fast! Same day, or next business day • Made to order • Solid sterling silver • Rolo chain • Lobster claw clasp • Eco-friendly recycled Kraft jewelry box • Made with all quality components; interlocking rings made with quality sterling silver, strong rolo chain that won't break on you and finished with upgraded quality lobster claw clasp Wonderful 40th birthday gift idea for: mom, wife, sister, an aunt, best friend, coworker or boss