---
title: "SizeEcho Shopify App Profile"
description: "SizeEcho shows apparel merchants which products and sizes run too small, true to size, or too big, using buyer answers after an order ships. After fulfillment it waits a delay you set, then sends one event to Klaviyo. Your Klaviyo Flow emails the fit check-in. Answers land in Overview, Products, and Sizes so you can improve size guides and product copy. Requires Klaviyo. SizeEcho does not email buyers itself. Billing uses Shopify Billing."
canonical_url: "https://shoplist.co/shopify-apps/sizeecho"
markdown_url: "https://shoplist.co/shopify-apps/sizeecho.md"
last_updated: "2026-11-13"
entity_type: "shopify_app"
slug: "sizeecho"
source: "public Shopify app profile allowlist"
---

# SizeEcho Shopify App Profile

> SizeEcho shows apparel merchants which products and sizes run too small, true to size, or too big, using buyer answers after an order ships. After fulfillment it waits a delay you set, then sends one event to Klaviyo. Your Klaviyo Flow emails the fit check-in. Answers land in Overview, Products, and Sizes so you can improve size guides and product copy. Requires Klaviyo. SizeEcho does not email buyers itself. Billing uses Shopify Billing.

## Quick answer
SizeEcho has 0 detected stores in Shoplist. This Markdown profile displays 0 public brand examples; it is not a complete customer list.

## Key facts
- Name: SizeEcho
- Monitoring status: First-adopter watch
- Developer: SizeEcho
- Developer profile: https://shoplist.co/app-developers/fitsignal
- Shopify App Store URL: https://apps.shopify.com/sizeecho
- Launch date: November 13, 2026
- Shoplist category: Marketing Automation
- Free plan signal: Yes

## Pricing summary
Free: Free; Core: $29/month; Scale: $79/month

Shoplist has not yet found reliable public storefront evidence connecting a Shopify store to this app. This does not mean the app has no users. Some apps are new, admin-only, server-side, theme-independent, or otherwise difficult to detect from public storefront signals.


## Public callouts
- See which products and sizes run small or large from buyer fit answers
- After shipping, send a fit check-in through your Klaviyo Flow
- Buyers pick too small, true to size, or too big \(optional reasons\)
- Review answers in Overview, Products, and Sizes to fix size guides
## Shopify App Store categories
- Analytics
- Surveys

## Data note
Profile updated: November 13, 2026. This is the profile revision date, not a guarantee that every store was checked on that date.
Public snapshot built: 2026-11-14 06:05:54.312527\+00
This generated Markdown profile intentionally exposes only public, stable app-profile fields and a small public app-stack sample from Shoplist. It excludes private contact data, people data, internal scores, crawl provenance, full datasets, and unstable operational fields.

## Related links
- [HTML app profile](https://shoplist.co/shopify-apps/sizeecho)
- [Shopify apps directory](https://shoplist.co/shopify-apps)
- [Shoplist data methodology](https://shoplist.co/data-methodology.md)