diff --git a/scripts/estimate-size.js b/scripts/estimate-size.js
new file mode 100644
index 0000000..341abc0
--- /dev/null
+++ b/scripts/estimate-size.js
@@ -0,0 +1,65 @@
+// @ts-check
+
+const pb = require("prettier-bytes")
+const sqlite = require("better-sqlite3")
+const HeatSync = require("heatsync")
+
+const {reg} = require("../src/matrix/read-registration")
+const passthrough = require("../src/passthrough")
+
+const sync = new HeatSync({watchFS: false})
+Object.assign(passthrough, {reg, sync})
+
+const DiscordClient = require("../src/d2m/discord-client")
+
+const discord = new DiscordClient(reg.ooye.discord_token, "no")
+passthrough.discord = discord
+
+const db = new sqlite("ooye.db")
+passthrough.db = db
+
+const api = require("../src/matrix/api")
+
+const {room: roomID} = require("minimist")(process.argv.slice(2), {string: ["room"]})
+if (!roomID) {
+	console.error("Usage: ./scripts/estimate-size.js --room=<!room id here>")
+	process.exit(1)
+}
+
+const {channel_id, guild_id} = db.prepare("SELECT channel_id, guild_id FROM channel_room WHERE room_id = ?").get(roomID)
+
+const max = 1000
+
+;(async () => {
+	let total = 0
+	let size = 0
+	let from
+
+	while (total < max) {
+		const events = await api.getEvents(roomID, "b", {limit: 1000, from})
+		total += events.chunk.length
+		from = events.end
+		console.log(`Fetched ${total} events so far`)
+
+		for (const e of events.chunk) {
+			if (e.content?.info?.size) {
+				size += e.content.info.size
+			}
+		}
+
+		if (events.chunk.length === 0 || !events.end) break
+	}
+
+	console.log(`Total size of uploads: ${pb(size)}`)
+
+	const searchResults = await discord.snow.requestHandler.request(`/guilds/${guild_id}/messages/search`, {
+		channel_id,
+		offset: "0",
+		limit: "1"
+	}, "get", "json")
+
+	const totalAllTime = searchResults.total_results
+	const fractionCounted = total / totalAllTime
+	console.log(`That counts for ${(fractionCounted*100).toFixed(2)}% of the history on Discord (${totalAllTime.toLocaleString()} messages)`)
+	console.log(`The size of uploads for the whole history would be approx: ${pb(Math.floor(size/total*totalAllTime))}`)
+})()
diff --git a/src/matrix/api.js b/src/matrix/api.js
index 70cb50b..87bbf0c 100644
--- a/src/matrix/api.js
+++ b/src/matrix/api.js
@@ -136,7 +136,7 @@ async function getEventForTimestamp(roomID, ts) {
  */
 async function getEvents(roomID, dir, pagination = {}, filter) {
 	filter = filter && JSON.stringify(filter)
-	/** @type {Ty.Pagination<Ty.Event.Outer<any>>} */
+	/** @type {Ty.MessagesPagination<Ty.Event.Outer<any>>} */
 	const root = await mreq.mreq("GET", path(`/client/v3/rooms/${roomID}/messages`, null, {...pagination, dir, filter}))
 	return root
 }
diff --git a/src/types.d.ts b/src/types.d.ts
index 6ee2eb1..a85907d 100644
--- a/src/types.d.ts
+++ b/src/types.d.ts
@@ -498,7 +498,13 @@ export type Membership = "invite" | "knock" | "join" | "leave" | "ban"
 export type Pagination<T> = {
 	chunk: T[]
 	next_batch?: string
-	prev_match?: string
+	prev_batch?: string
+}
+
+export type MessagesPagination<T> = {
+	chunk: T[]
+	start: string
+	end?: string
 }
 
 export type HierarchyPagination<T> = {