Next Size Up was founded with a simple yet powerful mission: make every growth spurt a chance to save money, help the planet, and connect families through shared resources. We are a sustainable children’s clothing brand built to make shopping for baby and toddler clothes (Newborn–5T) affordable, eco-friendly, and hassle-free.

We know every child is different, which is why we offer personalized size recommendations based on height and weight, ensuring the perfect fit every time. We curate high-quality, gently used kids’ clothing bundles that are sorted by size, style, and season — helping families skip the stress of shopping new while reducing textile waste and extending the life of preloved clothes.

We also make it easy to give back. Parents can donate their child’s outgrown clothes by requesting a free donation kit, printing a prepaid label, or scheduling a porch pickup (for MA + RI). Every donated item helps another family access affordable, well-loved kids’ clothes — keeping great pieces in circulation and out of landfills.

Next Size Up isn’t just about clothes — it’s about community, sustainability, and building a better system for the next generation.

What is Next Size Up?

An animated woman with long red hair in a braid, eyes closed, holding a globe of the Earth in front of her chest.

Who is Behind Next Size Up?

I’m Mae, a single mom who knows just how hard it can be to keep up with the constant need for new kids’ clothes. When my little ones were growing fast, the only way I could afford quality outfits was by constantly watching online marketplaces — waiting and hoping the right sizes would pop up at the right time.

It was stressful, unpredictable, and made me wonder: why isn’t there an easier, more reliable, more accessible way for parents to get affordable, gently used kids’ clothing?

With a background in business and a passion for sustainability and accessibility, I built Next Size Up as a practical way for families to share resources and reduce waste — while still dressing their kids in styles they love. Every decision we make, from eco-friendly packaging to thoughtful sizing recommendations, is grounded in our mission to serve real families in meaningful, impactful ways.

This is how Next Size Up was born. I wanted to create a system where parents could easily shop curated, size-specific secondhand bundles — without waiting, digging, or guessing — and where families could donate outgrown clothes to help others, keeping good clothes in circulation. What started as a personal solution has grown into a mission-driven business — built by a mom, for families everywhere.

When you shop or donate with Next Size Up, you’re not just making a purchase — you’re joining a growing movement to change how we think about kids’ clothing and community. Thank you for being part of it. 🌱

A woman with glasses and long blonde hair, wearing a pink cap, is hugging two young children outside a store. The boy has blonde hair, is sitting on the woman's lap, wearing a light green shirt and khaki shorts. Both children are eating candy.

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