diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 361c5848f0..85d576e81b 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -36,13 +36,12 @@ jobs:
           fail_ci_if_error: false
           verbose: true
 
-  cypress-build:
+  build:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
       - uses: ./.github/actions/setup
       - run: yarn prepare
-
       - run: yarn build
       - uses: actions/upload-artifact@v2
         with:
@@ -50,6 +49,24 @@ jobs:
           path: build
           if-no-files-found: error
 
+  size-tests:
+    needs: [build]
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: ./.github/actions/setup
+      - uses: actions/download-artifact@v2
+        with:
+          name: build
+          path: build
+      - run: yarn test:size
+
+
+  cypress-build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: ./.github/actions/setup
       - uses: actions/cache@v3
         id: cypress-cache
         with:
@@ -59,7 +76,7 @@ jobs:
         run: yarn cypress install
 
   cypress-test-matrix:
-    needs: cypress-build
+    needs: [build, cypress-build]
     runs-on: ubuntu-latest
     strategy:
       fail-fast: false
@@ -96,7 +113,7 @@ jobs:
 
   # Included as a single job to check against for cypress test success, as cypress runs in a matrix.
   cypress-tests:
-    needs: cypress-test-matrix
+    needs: [cypress-test-matrix]
     runs-on: ubuntu-latest
     steps:
       - run: echo 'Finished cypress tests https\://dashboard.cypress.io/projects/yp82ef'
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index a1455bc422..0d2b3d95c2 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -64,6 +64,14 @@ To run _all_ cypress integration tests _from the command line_:
 yarn cypress:run
 ```
 
+## Adding a new dependency
+
+Adding many new dependencies would cause bloat, so we have a test to guard against this: `scripts/test-size.js`. This will run as part of CI with every PR.
+
+If you *need* to add a new dependency, and it causes the generated build to exceed its size quota, you'll need to increase the quota. Do so in `scripts/test-size.js`.
+
+You can also run the test on your last build using `yarn build && yarn test:size`. If you exceed the size quota, it will let you know what to do :).
+
 ## Engineering standards
 
 Code merged into the `main` branch of this repository should adhere to high standards of correctness and maintainability.
diff --git a/package.json b/package.json
index 1812488b7b..51e6014314 100644
--- a/package.json
+++ b/package.json
@@ -8,11 +8,11 @@
     "contracts:compile:abi": "typechain --target ethers-v5 --out-dir src/abis/types \"./src/abis/**/*.json\"",
     "contracts:compile:v3": "typechain --target ethers-v5 --out-dir src/types/v3 \"./node_modules/@uniswap/**/artifacts/contracts/**/*[!dbg].json\"",
     "contracts:compile": "yarn contracts:compile:abi && yarn contracts:compile:v3",
-    "graphql:fetch": "node fetch-schema.js",
+    "graphql:fetch": "node scripts/fetch-schema.js",
     "graphql:generate:data": "graphql-codegen --config apollo-codegen.ts",
     "graphql:generate:thegraph": "graphql-codegen --config apollo-codegen_thegraph.ts",
     "graphql:generate": "yarn graphql:generate:data && yarn graphql:generate:thegraph",
-    "prei18n:extract": "node prei18n-extract.js",
+    "prei18n:extract": "node scripts/prei18n-extract.js",
     "i18n:extract": "lingui extract --locale en-US",
     "i18n:compile": "yarn i18n:extract && lingui compile",
     "i18n:pseudo": "lingui extract --locale pseudo && lingui compile",
@@ -23,6 +23,7 @@
     "deduplicate": "yarn-deduplicate --strategy=highest",
     "lint": "yarn eslint .",
     "test": "craco test --coverage",
+    "test:size": "node scripts/test-size.js",
     "cypress:open": "cypress open --browser chrome --e2e",
     "cypress:run": "cypress run --browser chrome --e2e",
     "postinstall": "patch-package"
diff --git a/fetch-schema.js b/scripts/fetch-schema.js
similarity index 85%
rename from fetch-schema.js
rename to scripts/fetch-schema.js
index 229ea8428d..987f5ff7c9 100644
--- a/fetch-schema.js
+++ b/scripts/fetch-schema.js
@@ -3,8 +3,8 @@
 require('dotenv').config({ path: '.env.production' })
 
 const { exec } = require('child_process')
-const dataConfig = require('./graphql.config')
-const thegraphConfig = require('./graphql_thegraph.config')
+const dataConfig = require('../graphql.config')
+const thegraphConfig = require('../graphql_thegraph.config')
 
 function fetchSchema(url, outputFile) {
   exec(
diff --git a/prei18n-extract.js b/scripts/prei18n-extract.js
similarity index 100%
rename from prei18n-extract.js
rename to scripts/prei18n-extract.js
diff --git a/scripts/test-size.js b/scripts/test-size.js
new file mode 100644
index 0000000000..f2f09e2f14
--- /dev/null
+++ b/scripts/test-size.js
@@ -0,0 +1,58 @@
+/* eslint-disable no-undef */
+const assert = require('assert')
+const chalk = require('chalk')
+const fs = require('fs')
+const gzipSize = require('gzip-size').sync
+const path = require('path')
+
+const buildDir = path.join(__dirname, '../build')
+
+let entrypoints
+try {
+  entrypoints = require(path.join(buildDir, 'asset-manifest.json')).entrypoints
+} catch (e) {
+  console.log(chalk.yellow('You must build first: `yarn build`'))
+  process.exit(1)
+}
+
+// The last recorded size for these assets, as reported by `yarn build`.
+const MAX_SIZE_MAIN_KB = 361.36
+
+// This is the async-loaded js, called <number>.<hash>.js, with a matching css file.
+const MAX_SIZE_ENTRY_MB = 1.38
+
+const SIZE_TOLERANCE_KB = 5
+
+const jsEntrypoints = entrypoints.filter((entrypoint) => entrypoint.endsWith('js'))
+assert(jsEntrypoints.length === 3)
+
+let fail = false
+console.log('File sizes after gzip:\n')
+jsEntrypoints.forEach((entrypoint) => {
+  const name = entrypoint.match(/\/([\w\d-]*)\./)[1]
+  const size = gzipSize(fs.readFileSync(path.join(buildDir, entrypoint)))
+
+  let maxSize = MAX_SIZE_ENTRY_MB * 1024 * 1024
+  if (name === 'runtime-main') {
+    return
+  } else if (name === 'main') {
+    maxSize = MAX_SIZE_MAIN_KB * 1024
+  }
+  maxSize += SIZE_TOLERANCE_KB * 1024
+
+  if (maxSize > size) {
+    console.log(chalk.green(`\t${toKb(maxSize)}\t${entrypoint}`))
+  } else {
+    console.log(chalk.red(`\t${toKb(maxSize)}\t${entrypoint}`), '\tdid you import an unnecessary dependency?')
+    fail = true
+  }
+})
+if (fail) {
+  console.log(chalk.yellow('\nOne or more of your files has grown too large.'))
+  console.log(chalk.yellow('Reduce the file size or update the size limit (in scripts/test-size.js)'))
+  process.exit(1)
+}
+
+function toKb(bytes) {
+  return ((bytes / 1024).toFixed(2) + ' kB').padEnd(8)
+}